6.0.0

I'm extremely stupid and didn't commit as I go. To anyone reading this
I'm extremely sorry. A lot of these changes are very broad and I plan on
releasing Babel 6.0.0 today live on stage at Ember Camp London so I'm
afraid I couldn't wait. If you're ever in London I'll buy you a beer
(or assorted beverage!) to make up for it, also I'll kiss your feet and
give you a back massage, maybe.

packages/babel-traverse/src/path/conversion.js

@@ -1,21 +1,23 @@
+/* @flow */
+
 // This file contains methods that convert the path node into another node or some other type of data.
 
 import * as t from "babel-types";
 
 export function toComputedKey(): Object {
-  var node = this.node;
+  let node = this.node;
 
-  var key;
+  let key;
   if (this.isMemberExpression()) {
     key = node.property;
-  } else if (this.isProperty()) {
+  } else if (this.isProperty() || this.isMethod()) {
     key = node.key;
   } else {
     throw new ReferenceError("todo");
   }
 
   if (!node.computed) {
-    if (t.isIdentifier(key)) key = t.literal(key.name);
+    if (t.isIdentifier(key)) key = t.stringLiteral(key.name);
   }
 
   return key;
@@ -24,3 +26,15 @@ export function toComputedKey(): Object {
 export function ensureBlock() {
   return t.ensureBlock(this.node);
 }
+
+export function arrowFunctionToShadowed() {
+  // todo: maybe error
+  if (!this.isArrowFunctionExpression()) return;
+
+  this.ensureBlock();
+
+  let { node } = this;
+  node.expression = false;
+  node.type = "FunctionExpression";
+  node.shadow = node.shadow || true;
+}