Added node_modules for the updating to work properly.

6 files changed, 1103 insertions, 0 deletions

diff --git a/node_modules/estraverse/.jshintrc b/node_modules/estraverse/.jshintrc
new file mode 100644
index 0000000..f642dae
--- /dev/null
+++ b/node_modules/estraverse/.jshintrc
@@ -0,0 +1,16 @@
+{
+  "curly": true,
+  "eqeqeq": true,
+  "immed": true,
+  "eqnull": true,
+  "latedef": true,
+  "noarg": true,
+  "noempty": true,
+  "quotmark": "single",
+  "undef": true,
+  "unused": true,
+  "strict": true,
+  "trailing": true,
+
+  "node": true
+}
diff --git a/node_modules/estraverse/LICENSE.BSD b/node_modules/estraverse/LICENSE.BSD
new file mode 100644
index 0000000..3e580c3
--- /dev/null
+++ b/node_modules/estraverse/LICENSE.BSD
@@ -0,0 +1,19 @@
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+  * Redistributions of source code must retain the above copyright
+    notice, this list of conditions and the following disclaimer.
+  * Redistributions in binary form must reproduce the above copyright
+    notice, this list of conditions and the following disclaimer in the
+    documentation and/or other materials provided with the distribution.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
+DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/node_modules/estraverse/README.md b/node_modules/estraverse/README.md
new file mode 100644
index 0000000..ccd3377
--- /dev/null
+++ b/node_modules/estraverse/README.md
@@ -0,0 +1,153 @@
+### Estraverse [![Build Status](https://secure.travis-ci.org/estools/estraverse.svg)](http://travis-ci.org/estools/estraverse)
+
+Estraverse ([estraverse](http://github.com/estools/estraverse)) is
+[ECMAScript](http://www.ecma-international.org/publications/standards/Ecma-262.htm)
+traversal functions from [esmangle project](http://github.com/estools/esmangle).
+
+### Documentation
+
+You can find usage docs at [wiki page](https://github.com/estools/estraverse/wiki/Usage).
+
+### Example Usage
+
+The following code will output all variables declared at the root of a file.
+
+```javascript
+estraverse.traverse(ast, {
+    enter: function (node, parent) {
+        if (node.type == 'FunctionExpression' || node.type == 'FunctionDeclaration')
+            return estraverse.VisitorOption.Skip;
+    },
+    leave: function (node, parent) {
+        if (node.type == 'VariableDeclarator')
+          console.log(node.id.name);
+    }
+});
+```
+
+We can use `this.skip`, `this.remove` and `this.break` functions instead of using Skip, Remove and Break.
+
+```javascript
+estraverse.traverse(ast, {
+    enter: function (node) {
+        this.break();
+    }
+});
+```
+
+And estraverse provides `estraverse.replace` function. When returning node from `enter`/`leave`, current node is replaced with it.
+
+```javascript
+result = estraverse.replace(tree, {
+    enter: function (node) {
+        // Replace it with replaced.
+        if (node.type === 'Literal')
+            return replaced;
+    }
+});
+```
+
+By passing `visitor.keys` mapping, we can extend estraverse traversing functionality.
+
+```javascript
+// This tree contains a user-defined `TestExpression` node.
+var tree = {
+    type: 'TestExpression',
+
+    // This 'argument' is the property containing the other **node**.
+    argument: {
+        type: 'Literal',
+        value: 20
+    },
+
+    // This 'extended' is the property not containing the other **node**.
+    extended: true
+};
+estraverse.traverse(tree, {
+    enter: function (node) { },
+
+    // Extending the existing traversing rules.
+    keys: {
+        // TargetNodeName: [ 'keys', 'containing', 'the', 'other', '**node**' ]
+        TestExpression: ['argument']
+    }
+});
+```
+
+By passing `visitor.fallback` option, we can control the behavior when encountering unknown nodes.
+
+```javascript
+// This tree contains a user-defined `TestExpression` node.
+var tree = {
+    type: 'TestExpression',
+
+    // This 'argument' is the property containing the other **node**.
+    argument: {
+        type: 'Literal',
+        value: 20
+    },
+
+    // This 'extended' is the property not containing the other **node**.
+    extended: true
+};
+estraverse.traverse(tree, {
+    enter: function (node) { },
+
+    // Iterating the child **nodes** of unknown nodes.
+    fallback: 'iteration'
+});
+```
+
+When `visitor.fallback` is a function, we can determine which keys to visit on each node.
+
+```javascript
+// This tree contains a user-defined `TestExpression` node.
+var tree = {
+    type: 'TestExpression',
+
+    // This 'argument' is the property containing the other **node**.
+    argument: {
+        type: 'Literal',
+        value: 20
+    },
+
+    // This 'extended' is the property not containing the other **node**.
+    extended: true
+};
+estraverse.traverse(tree, {
+    enter: function (node) { },
+
+    // Skip the `argument` property of each node
+    fallback: function(node) {
+        return Object.keys(node).filter(function(key) {
+            return key !== 'argument';
+        });
+    }
+});
+```
+
+### License
+
+Copyright (C) 2012-2016 [Yusuke Suzuki](http://github.com/Constellation)
+ (twitter: [@Constellation](http://twitter.com/Constellation)) and other contributors.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+  * Redistributions of source code must retain the above copyright
+    notice, this list of conditions and the following disclaimer.
+
+  * Redistributions in binary form must reproduce the above copyright
+    notice, this list of conditions and the following disclaimer in the
+    documentation and/or other materials provided with the distribution.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
+DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/node_modules/estraverse/estraverse.js b/node_modules/estraverse/estraverse.js
new file mode 100644
index 0000000..f0d9af9
--- /dev/null
+++ b/node_modules/estraverse/estraverse.js
@@ -0,0 +1,805 @@
+/*
+  Copyright (C) 2012-2013 Yusuke Suzuki <utatane.tea@gmail.com>
+  Copyright (C) 2012 Ariya Hidayat <ariya.hidayat@gmail.com>
+
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions are met:
+
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above copyright
+      notice, this list of conditions and the following disclaimer in the
+      documentation and/or other materials provided with the distribution.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+  ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
+  DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+  (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+  LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+  ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+/*jslint vars:false, bitwise:true*/
+/*jshint indent:4*/
+/*global exports:true*/
+(function clone(exports) {
+    'use strict';
+
+    var Syntax,
+        VisitorOption,
+        VisitorKeys,
+        BREAK,
+        SKIP,
+        REMOVE;
+
+    function deepCopy(obj) {
+        var ret = {}, key, val;
+        for (key in obj) {
+            if (obj.hasOwnProperty(key)) {
+                val = obj[key];
+                if (typeof val === 'object' && val !== null) {
+                    ret[key] = deepCopy(val);
+                } else {
+                    ret[key] = val;
+                }
+            }
+        }
+        return ret;
+    }
+
+    // based on LLVM libc++ upper_bound / lower_bound
+    // MIT License
+
+    function upperBound(array, func) {
+        var diff, len, i, current;
+
+        len = array.length;
+        i = 0;
+
+        while (len) {
+            diff = len >>> 1;
+            current = i + diff;
+            if (func(array[current])) {
+                len = diff;
+            } else {
+                i = current + 1;
+                len -= diff + 1;
+            }
+        }
+        return i;
+    }
+
+    Syntax = {
+        AssignmentExpression: 'AssignmentExpression',
+        AssignmentPattern: 'AssignmentPattern',
+        ArrayExpression: 'ArrayExpression',
+        ArrayPattern: 'ArrayPattern',
+        ArrowFunctionExpression: 'ArrowFunctionExpression',
+        AwaitExpression: 'AwaitExpression', // CAUTION: It's deferred to ES7.
+        BlockStatement: 'BlockStatement',
+        BinaryExpression: 'BinaryExpression',
+        BreakStatement: 'BreakStatement',
+        CallExpression: 'CallExpression',
+        CatchClause: 'CatchClause',
+        ChainExpression: 'ChainExpression',
+        ClassBody: 'ClassBody',
+        ClassDeclaration: 'ClassDeclaration',
+        ClassExpression: 'ClassExpression',
+        ComprehensionBlock: 'ComprehensionBlock',  // CAUTION: It's deferred to ES7.
+        ComprehensionExpression: 'ComprehensionExpression',  // CAUTION: It's deferred to ES7.
+        ConditionalExpression: 'ConditionalExpression',
+        ContinueStatement: 'ContinueStatement',
+        DebuggerStatement: 'DebuggerStatement',
+        DirectiveStatement: 'DirectiveStatement',
+        DoWhileStatement: 'DoWhileStatement',
+        EmptyStatement: 'EmptyStatement',
+        ExportAllDeclaration: 'ExportAllDeclaration',
+        ExportDefaultDeclaration: 'ExportDefaultDeclaration',
+        ExportNamedDeclaration: 'ExportNamedDeclaration',
+        ExportSpecifier: 'ExportSpecifier',
+        ExpressionStatement: 'ExpressionStatement',
+        ForStatement: 'ForStatement',
+        ForInStatement: 'ForInStatement',
+        ForOfStatement: 'ForOfStatement',
+        FunctionDeclaration: 'FunctionDeclaration',
+        FunctionExpression: 'FunctionExpression',
+        GeneratorExpression: 'GeneratorExpression',  // CAUTION: It's deferred to ES7.
+        Identifier: 'Identifier',
+        IfStatement: 'IfStatement',
+        ImportExpression: 'ImportExpression',
+        ImportDeclaration: 'ImportDeclaration',
+        ImportDefaultSpecifier: 'ImportDefaultSpecifier',
+        ImportNamespaceSpecifier: 'ImportNamespaceSpecifier',
+        ImportSpecifier: 'ImportSpecifier',
+        Literal: 'Literal',
+        LabeledStatement: 'LabeledStatement',
+        LogicalExpression: 'LogicalExpression',
+        MemberExpression: 'MemberExpression',
+        MetaProperty: 'MetaProperty',
+        MethodDefinition: 'MethodDefinition',
+        ModuleSpecifier: 'ModuleSpecifier',
+        NewExpression: 'NewExpression',
+        ObjectExpression: 'ObjectExpression',
+        ObjectPattern: 'ObjectPattern',
+        PrivateIdentifier: 'PrivateIdentifier',
+        Program: 'Program',
+        Property: 'Property',
+        PropertyDefinition: 'PropertyDefinition',
+        RestElement: 'RestElement',
+        ReturnStatement: 'ReturnStatement',
+        SequenceExpression: 'SequenceExpression',
+        SpreadElement: 'SpreadElement',
+        Super: 'Super',
+        SwitchStatement: 'SwitchStatement',
+        SwitchCase: 'SwitchCase',
+        TaggedTemplateExpression: 'TaggedTemplateExpression',
+        TemplateElement: 'TemplateElement',
+        TemplateLiteral: 'TemplateLiteral',
+        ThisExpression: 'ThisExpression',
+        ThrowStatement: 'ThrowStatement',
+        TryStatement: 'TryStatement',
+        UnaryExpression: 'UnaryExpression',
+        UpdateExpression: 'UpdateExpression',
+        VariableDeclaration: 'VariableDeclaration',
+        VariableDeclarator: 'VariableDeclarator',
+        WhileStatement: 'WhileStatement',
+        WithStatement: 'WithStatement',
+        YieldExpression: 'YieldExpression'
+    };
+
+    VisitorKeys = {
+        AssignmentExpression: ['left', 'right'],
+        AssignmentPattern: ['left', 'right'],
+        ArrayExpression: ['elements'],
+        ArrayPattern: ['elements'],
+        ArrowFunctionExpression: ['params', 'body'],
+        AwaitExpression: ['argument'], // CAUTION: It's deferred to ES7.
+        BlockStatement: ['body'],
+        BinaryExpression: ['left', 'right'],
+        BreakStatement: ['label'],
+        CallExpression: ['callee', 'arguments'],
+        CatchClause: ['param', 'body'],
+        ChainExpression: ['expression'],
+        ClassBody: ['body'],
+        ClassDeclaration: ['id', 'superClass', 'body'],
+        ClassExpression: ['id', 'superClass', 'body'],
+        ComprehensionBlock: ['left', 'right'],  // CAUTION: It's deferred to ES7.
+        ComprehensionExpression: ['blocks', 'filter', 'body'],  // CAUTION: It's deferred to ES7.
+        ConditionalExpression: ['test', 'consequent', 'alternate'],
+        ContinueStatement: ['label'],
+        DebuggerStatement: [],
+        DirectiveStatement: [],
+        DoWhileStatement: ['body', 'test'],
+        EmptyStatement: [],
+        ExportAllDeclaration: ['source'],
+        ExportDefaultDeclaration: ['declaration'],
+        ExportNamedDeclaration: ['declaration', 'specifiers', 'source'],
+        ExportSpecifier: ['exported', 'local'],
+        ExpressionStatement: ['expression'],
+        ForStatement: ['init', 'test', 'update', 'body'],
+        ForInStatement: ['left', 'right', 'body'],
+        ForOfStatement: ['left', 'right', 'body'],
+        FunctionDeclaration: ['id', 'params', 'body'],
+        FunctionExpression: ['id', 'params', 'body'],
+        GeneratorExpression: ['blocks', 'filter', 'body'],  // CAUTION: It's deferred to ES7.
+        Identifier: [],
+        IfStatement: ['test', 'consequent', 'alternate'],
+        ImportExpression: ['source'],
+        ImportDeclaration: ['specifiers', 'source'],
+        ImportDefaultSpecifier: ['local'],
+        ImportNamespaceSpecifier: ['local'],
+        ImportSpecifier: ['imported', 'local'],
+        Literal: [],
+        LabeledStatement: ['label', 'body'],
+        LogicalExpression: ['left', 'right'],
+        MemberExpression: ['object', 'property'],
+        MetaProperty: ['meta', 'property'],
+        MethodDefinition: ['key', 'value'],
+        ModuleSpecifier: [],
+        NewExpression: ['callee', 'arguments'],
+        ObjectExpression: ['properties'],
+        ObjectPattern: ['properties'],
+        PrivateIdentifier: [],
+        Program: ['body'],
+        Property: ['key', 'value'],
+        PropertyDefinition: ['key', 'value'],
+        RestElement: [ 'argument' ],
+        ReturnStatement: ['argument'],
+        SequenceExpression: ['expressions'],
+        SpreadElement: ['argument'],
+        Super: [],
+        SwitchStatement: ['discriminant', 'cases'],
+        SwitchCase: ['test', 'consequent'],
+        TaggedTemplateExpression: ['tag', 'quasi'],
+        TemplateElement: [],
+        TemplateLiteral: ['quasis', 'expressions'],
+        ThisExpression: [],
+        ThrowStatement: ['argument'],
+        TryStatement: ['block', 'handler', 'finalizer'],
+        UnaryExpression: ['argument'],
+        UpdateExpression: ['argument'],
+        VariableDeclaration: ['declarations'],
+        VariableDeclarator: ['id', 'init'],
+        WhileStatement: ['test', 'body'],
+        WithStatement: ['object', 'body'],
+        YieldExpression: ['argument']
+    };
+
+    // unique id
+    BREAK = {};
+    SKIP = {};
+    REMOVE = {};
+
+    VisitorOption = {
+        Break: BREAK,
+        Skip: SKIP,
+        Remove: REMOVE
+    };
+
+    function Reference(parent, key) {
+        this.parent = parent;
+        this.key = key;
+    }
+
+    Reference.prototype.replace = function replace(node) {
+        this.parent[this.key] = node;
+    };
+
+    Reference.prototype.remove = function remove() {
+        if (Array.isArray(this.parent)) {
+            this.parent.splice(this.key, 1);
+            return true;
+        } else {
+            this.replace(null);
+            return false;
+        }
+    };
+
+    function Element(node, path, wrap, ref) {
+        this.node = node;
+        this.path = path;
+        this.wrap = wrap;
+        this.ref = ref;
+    }
+
+    function Controller() { }
+
+    // API:
+    // return property path array from root to current node
+    Controller.prototype.path = function path() {
+        var i, iz, j, jz, result, element;
+
+        function addToPath(result, path) {
+            if (Array.isArray(path)) {
+                for (j = 0, jz = path.length; j < jz; ++j) {
+                    result.push(path[j]);
+                }
+            } else {
+                result.push(path);
+            }
+        }
+
+        // root node
+        if (!this.__current.path) {
+            return null;
+        }
+
+        // first node is sentinel, second node is root element
+        result = [];
+        for (i = 2, iz = this.__leavelist.length; i < iz; ++i) {
+            element = this.__leavelist[i];
+            addToPath(result, element.path);
+        }
+        addToPath(result, this.__current.path);
+        return result;
+    };
+
+    // API:
+    // return type of current node
+    Controller.prototype.type = function () {
+        var node = this.current();
+        return node.type || this.__current.wrap;
+    };
+
+    // API:
+    // return array of parent elements
+    Controller.prototype.parents = function parents() {
+        var i, iz, result;
+
+        // first node is sentinel
+        result = [];
+        for (i = 1, iz = this.__leavelist.length; i < iz; ++i) {
+            result.push(this.__leavelist[i].node);
+        }
+
+        return result;
+    };
+
+    // API:
+    // return current node
+    Controller.prototype.current = function current() {
+        return this.__current.node;
+    };
+
+    Controller.prototype.__execute = function __execute(callback, element) {
+        var previous, result;
+
+        result = undefined;
+
+        previous  = this.__current;
+        this.__current = element;
+        this.__state = null;
+        if (callback) {
+            result = callback.call(this, element.node, this.__leavelist[this.__leavelist.length - 1].node);
+        }
+        this.__current = previous;
+
+        return result;
+    };
+
+    // API:
+    // notify control skip / break
+    Controller.prototype.notify = function notify(flag) {
+        this.__state = flag;
+    };
+
+    // API:
+    // skip child nodes of current node
+    Controller.prototype.skip = function () {
+        this.notify(SKIP);
+    };
+
+    // API:
+    // break traversals
+    Controller.prototype['break'] = function () {
+        this.notify(BREAK);
+    };
+
+    // API:
+    // remove node
+    Controller.prototype.remove = function () {
+        this.notify(REMOVE);
+    };
+
+    Controller.prototype.__initialize = function(root, visitor) {
+        this.visitor = visitor;
+        this.root = root;
+        this.__worklist = [];
+        this.__leavelist = [];
+        this.__current = null;
+        this.__state = null;
+        this.__fallback = null;
+        if (visitor.fallback === 'iteration') {
+            this.__fallback = Object.keys;
+        } else if (typeof visitor.fallback === 'function') {
+            this.__fallback = visitor.fallback;
+        }
+
+        this.__keys = VisitorKeys;
+        if (visitor.keys) {
+            this.__keys = Object.assign(Object.create(this.__keys), visitor.keys);
+        }
+    };
+
+    function isNode(node) {
+        if (node == null) {
+            return false;
+        }
+        return typeof node === 'object' && typeof node.type === 'string';
+    }
+
+    function isProperty(nodeType, key) {
+        return (nodeType === Syntax.ObjectExpression || nodeType === Syntax.ObjectPattern) && 'properties' === key;
+    }
+  
+    function candidateExistsInLeaveList(leavelist, candidate) {
+        for (var i = leavelist.length - 1; i >= 0; --i) {
+            if (leavelist[i].node === candidate) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    Controller.prototype.traverse = function traverse(root, visitor) {
+        var worklist,
+            leavelist,
+            element,
+            node,
+            nodeType,
+            ret,
+            key,
+            current,
+            current2,
+            candidates,
+            candidate,
+            sentinel;
+
+        this.__initialize(root, visitor);
+
+        sentinel = {};
+
+        // reference
+        worklist = this.__worklist;
+        leavelist = this.__leavelist;
+
+        // initialize
+        worklist.push(new Element(root, null, null, null));
+        leavelist.push(new Element(null, null, null, null));
+
+        while (worklist.length) {
+            element = worklist.pop();
+
+            if (element === sentinel) {
+                element = leavelist.pop();
+
+                ret = this.__execute(visitor.leave, element);
+
+                if (this.__state === BREAK || ret === BREAK) {
+                    return;
+                }
+                continue;
+            }
+
+            if (element.node) {
+
+                ret = this.__execute(visitor.enter, element);
+
+                if (this.__state === BREAK || ret === BREAK) {
+                    return;
+                }
+
+                worklist.push(sentinel);
+                leavelist.push(element);
+
+                if (this.__state === SKIP || ret === SKIP) {
+                    continue;
+                }
+
+                node = element.node;
+                nodeType = node.type || element.wrap;
+                candidates = this.__keys[nodeType];
+                if (!candidates) {
+                    if (this.__fallback) {
+                        candidates = this.__fallback(node);
+                    } else {
+                        throw new Error('Unknown node type ' + nodeType + '.');
+                    }
+                }
+
+                current = candidates.length;
+                while ((current -= 1) >= 0) {
+                    key = candidates[current];
+                    candidate = node[key];
+                    if (!candidate) {
+                        continue;
+                    }
+
+                    if (Array.isArray(candidate)) {
+                        current2 = candidate.length;
+                        while ((current2 -= 1) >= 0) {
+                            if (!candidate[current2]) {
+                                continue;
+                            }
+
+                            if (candidateExistsInLeaveList(leavelist, candidate[current2])) {
+                              continue;
+                            }
+
+                            if (isProperty(nodeType, candidates[current])) {
+                                element = new Element(candidate[current2], [key, current2], 'Property', null);
+                            } else if (isNode(candidate[current2])) {
+                                element = new Element(candidate[current2], [key, current2], null, null);
+                            } else {
+                                continue;
+                            }
+                            worklist.push(element);
+                        }
+                    } else if (isNode(candidate)) {
+                        if (candidateExistsInLeaveList(leavelist, candidate)) {
+                          continue;
+                        }
+
+                        worklist.push(new Element(candidate, key, null, null));
+                    }
+                }
+            }
+        }
+    };
+
+    Controller.prototype.replace = function replace(root, visitor) {
+        var worklist,
+            leavelist,
+            node,
+            nodeType,
+            target,
+            element,
+            current,
+            current2,
+            candidates,
+            candidate,
+            sentinel,
+            outer,
+            key;
+
+        function removeElem(element) {
+            var i,
+                key,
+                nextElem,
+                parent;
+
+            if (element.ref.remove()) {
+                // When the reference is an element of an array.
+                key = element.ref.key;
+                parent = element.ref.parent;
+
+                // If removed from array, then decrease following items' keys.
+                i = worklist.length;
+                while (i--) {
+                    nextElem = worklist[i];
+                    if (nextElem.ref && nextElem.ref.parent === parent) {
+                        if  (nextElem.ref.key < key) {
+                            break;
+                        }
+                        --nextElem.ref.key;
+                    }
+                }
+            }
+        }
+
+        this.__initialize(root, visitor);
+
+        sentinel = {};
+
+        // reference
+        worklist = this.__worklist;
+        leavelist = this.__leavelist;
+
+        // initialize
+        outer = {
+            root: root
+        };
+        element = new Element(root, null, null, new Reference(outer, 'root'));
+        worklist.push(element);
+        leavelist.push(element);
+
+        while (worklist.length) {
+            element = worklist.pop();
+
+            if (element === sentinel) {
+                element = leavelist.pop();
+
+                target = this.__execute(visitor.leave, element);
+
+                // node may be replaced with null,
+                // so distinguish between undefined and null in this place
+                if (target !== undefined && target !== BREAK && target !== SKIP && target !== REMOVE) {
+                    // replace
+                    element.ref.replace(target);
+                }
+
+                if (this.__state === REMOVE || target === REMOVE) {
+                    removeElem(element);
+                }
+
+                if (this.__state === BREAK || target === BREAK) {
+                    return outer.root;
+                }
+                continue;
+            }
+
+            target = this.__execute(visitor.enter, element);
+
+            // node may be replaced with null,
+            // so distinguish between undefined and null in this place
+            if (target !== undefined && target !== BREAK && target !== SKIP && target !== REMOVE) {
+                // replace
+                element.ref.replace(target);
+                element.node = target;
+            }
+
+            if (this.__state === REMOVE || target === REMOVE) {
+                removeElem(element);
+                element.node = null;
+            }
+
+            if (this.__state === BREAK || target === BREAK) {
+                return outer.root;
+            }
+
+            // node may be null
+            node = element.node;
+            if (!node) {
+                continue;
+            }
+
+            worklist.push(sentinel);
+            leavelist.push(element);
+
+            if (this.__state === SKIP || target === SKIP) {
+                continue;
+            }
+
+            nodeType = node.type || element.wrap;
+            candidates = this.__keys[nodeType];
+            if (!candidates) {
+                if (this.__fallback) {
+                    candidates = this.__fallback(node);
+                } else {
+                    throw new Error('Unknown node type ' + nodeType + '.');
+                }
+            }
+
+            current = candidates.length;
+            while ((current -= 1) >= 0) {
+                key = candidates[current];
+                candidate = node[key];
+                if (!candidate) {
+                    continue;
+                }
+
+                if (Array.isArray(candidate)) {
+                    current2 = candidate.length;
+                    while ((current2 -= 1) >= 0) {
+                        if (!candidate[current2]) {
+                            continue;
+                        }
+                        if (isProperty(nodeType, candidates[current])) {
+                            element = new Element(candidate[current2], [key, current2], 'Property', new Reference(candidate, current2));
+                        } else if (isNode(candidate[current2])) {
+                            element = new Element(candidate[current2], [key, current2], null, new Reference(candidate, current2));
+                        } else {
+                            continue;
+                        }
+                        worklist.push(element);
+                    }
+                } else if (isNode(candidate)) {
+                    worklist.push(new Element(candidate, key, null, new Reference(node, key)));
+                }
+            }
+        }
+
+        return outer.root;
+    };
+
+    function traverse(root, visitor) {
+        var controller = new Controller();
+        return controller.traverse(root, visitor);
+    }
+
+    function replace(root, visitor) {
+        var controller = new Controller();
+        return controller.replace(root, visitor);
+    }
+
+    function extendCommentRange(comment, tokens) {
+        var target;
+
+        target = upperBound(tokens, function search(token) {
+            return token.range[0] > comment.range[0];
+        });
+
+        comment.extendedRange = [comment.range[0], comment.range[1]];
+
+        if (target !== tokens.length) {
+            comment.extendedRange[1] = tokens[target].range[0];
+        }
+
+        target -= 1;
+        if (target >= 0) {
+            comment.extendedRange[0] = tokens[target].range[1];
+        }
+
+        return comment;
+    }
+
+    function attachComments(tree, providedComments, tokens) {
+        // At first, we should calculate extended comment ranges.
+        var comments = [], comment, len, i, cursor;
+
+        if (!tree.range) {
+            throw new Error('attachComments needs range information');
+        }
+
+        // tokens array is empty, we attach comments to tree as 'leadingComments'
+        if (!tokens.length) {
+            if (providedComments.length) {
+                for (i = 0, len = providedComments.length; i < len; i += 1) {
+                    comment = deepCopy(providedComments[i]);
+                    comment.extendedRange = [0, tree.range[0]];
+                    comments.push(comment);
+                }
+                tree.leadingComments = comments;
+            }
+            return tree;
+        }
+
+        for (i = 0, len = providedComments.length; i < len; i += 1) {
+            comments.push(extendCommentRange(deepCopy(providedComments[i]), tokens));
+        }
+
+        // This is based on John Freeman's implementation.
+        cursor = 0;
+        traverse(tree, {
+            enter: function (node) {
+                var comment;
+
+                while (cursor < comments.length) {
+                    comment = comments[cursor];
+                    if (comment.extendedRange[1] > node.range[0]) {
+                        break;
+                    }
+
+                    if (comment.extendedRange[1] === node.range[0]) {
+                        if (!node.leadingComments) {
+                            node.leadingComments = [];
+                        }
+                        node.leadingComments.push(comment);
+                        comments.splice(cursor, 1);
+                    } else {
+                        cursor += 1;
+                    }
+                }
+
+                // already out of owned node
+                if (cursor === comments.length) {
+                    return VisitorOption.Break;
+                }
+
+                if (comments[cursor].extendedRange[0] > node.range[1]) {
+                    return VisitorOption.Skip;
+                }
+            }
+        });
+
+        cursor = 0;
+        traverse(tree, {
+            leave: function (node) {
+                var comment;
+
+                while (cursor < comments.length) {
+                    comment = comments[cursor];
+                    if (node.range[1] < comment.extendedRange[0]) {
+                        break;
+                    }
+
+                    if (node.range[1] === comment.extendedRange[0]) {
+                        if (!node.trailingComments) {
+                            node.trailingComments = [];
+                        }
+                        node.trailingComments.push(comment);
+                        comments.splice(cursor, 1);
+                    } else {
+                        cursor += 1;
+                    }
+                }
+
+                // already out of owned node
+                if (cursor === comments.length) {
+                    return VisitorOption.Break;
+                }
+
+                if (comments[cursor].extendedRange[0] > node.range[1]) {
+                    return VisitorOption.Skip;
+                }
+            }
+        });
+
+        return tree;
+    }
+
+    exports.Syntax = Syntax;
+    exports.traverse = traverse;
+    exports.replace = replace;
+    exports.attachComments = attachComments;
+    exports.VisitorKeys = VisitorKeys;
+    exports.VisitorOption = VisitorOption;
+    exports.Controller = Controller;
+    exports.cloneEnvironment = function () { return clone({}); };
+
+    return exports;
+}(exports));
+/* vim: set sw=4 ts=4 et tw=80 : */
diff --git a/node_modules/estraverse/gulpfile.js b/node_modules/estraverse/gulpfile.js
new file mode 100644
index 0000000..8772bbc
--- /dev/null
+++ b/node_modules/estraverse/gulpfile.js
@@ -0,0 +1,70 @@
+/*
+  Copyright (C) 2014 Yusuke Suzuki <utatane.tea@gmail.com>
+
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions are met:
+
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above copyright
+      notice, this list of conditions and the following disclaimer in the
+      documentation and/or other materials provided with the distribution.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 'AS IS'
+  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+  ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
+  DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+  (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+  LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+  ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+'use strict';
+
+var gulp = require('gulp'),
+    git = require('gulp-git'),
+    bump = require('gulp-bump'),
+    filter = require('gulp-filter'),
+    tagVersion = require('gulp-tag-version');
+
+var TEST = [ 'test/*.js' ];
+var POWERED = [ 'powered-test/*.js' ];
+var SOURCE = [ 'src/**/*.js' ];
+
+/**
+ * Bumping version number and tagging the repository with it.
+ * Please read http://semver.org/
+ *
+ * You can use the commands
+ *
+ *     gulp patch     # makes v0.1.0 -> v0.1.1
+ *     gulp feature   # makes v0.1.1 -> v0.2.0
+ *     gulp release   # makes v0.2.1 -> v1.0.0
+ *
+ * To bump the version numbers accordingly after you did a patch,
+ * introduced a feature or made a backwards-incompatible release.
+ */
+
+function inc(importance) {
+    // get all the files to bump version in
+    return gulp.src(['./package.json'])
+        // bump the version number in those files
+        .pipe(bump({type: importance}))
+        // save it back to filesystem
+        .pipe(gulp.dest('./'))
+        // commit the changed version number
+        .pipe(git.commit('Bumps package version'))
+        // read only one file to get the version number
+        .pipe(filter('package.json'))
+        // **tag it in the repository**
+        .pipe(tagVersion({
+            prefix: ''
+        }));
+}
+
+gulp.task('patch', [ ], function () { return inc('patch'); })
+gulp.task('minor', [ ], function () { return inc('minor'); })
+gulp.task('major', [ ], function () { return inc('major'); })
diff --git a/node_modules/estraverse/package.json b/node_modules/estraverse/package.json
new file mode 100644
index 0000000..a863218
--- /dev/null
+++ b/node_modules/estraverse/package.json
@@ -0,0 +1,40 @@
+{
+  "name": "estraverse",
+  "description": "ECMAScript JS AST traversal functions",
+  "homepage": "https://github.com/estools/estraverse",
+  "main": "estraverse.js",
+  "version": "5.3.0",
+  "engines": {
+    "node": ">=4.0"
+  },
+  "maintainers": [
+    {
+      "name": "Yusuke Suzuki",
+      "email": "utatane.tea@gmail.com",
+      "web": "http://github.com/Constellation"
+    }
+  ],
+  "repository": {
+    "type": "git",
+    "url": "http://github.com/estools/estraverse.git"
+  },
+  "devDependencies": {
+    "babel-preset-env": "^1.6.1",
+    "babel-register": "^6.3.13",
+    "chai": "^2.1.1",
+    "espree": "^1.11.0",
+    "gulp": "^3.8.10",
+    "gulp-bump": "^0.2.2",
+    "gulp-filter": "^2.0.0",
+    "gulp-git": "^1.0.1",
+    "gulp-tag-version": "^1.3.0",
+    "jshint": "^2.5.6",
+    "mocha": "^2.1.0"
+  },
+  "license": "BSD-2-Clause",
+  "scripts": {
+    "test": "npm run-script lint && npm run-script unit-test",
+    "lint": "jshint estraverse.js",
+    "unit-test": "mocha --compilers js:babel-register"
+  }
+}