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-plugin-transform-es2015-literals/src/index.js

@@ -3,15 +3,15 @@ export default function () {
     visitor: {
       NumberLiteral(node) {
         // number octal like 0b10 or 0o70
-        if (/^0[ob]/i.test(node.raw)) {
-          node.raw = undefined;
+        if (node.extra && /^0[ob]/i.test(node.extra.raw)) {
+          node.extra = undefined;
         }
       },
 
       StringLiteral(node) {
         // unicode escape
-        if (/\\[u]/gi.test(node.raw)) {
-          node.raw = undefined;
+        if (node.extra && /\\[u]/gi.test(node.extra.raw)) {
+          node.extra = undefined;
         }
       }
     }