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-object-rest-spread/src/index.js

@@ -1,7 +1,46 @@
-export default function () {
+export default function ({ types: t }) {
+  function hasSpread(node) {
+    for (let prop of (node.properties: Array<Object>)) {
+      if (t.isSpreadProperty(prop)) {
+        return true;
+      }
+    }
+    return false;
+  }
+
   return {
+    inherits: require("babel-plugin-syntax-object-rest-spread"),
+
     visitor: {
-      // your visitor methods go here
+      ObjectExpression(path, file) {
+        if (!hasSpread(path.node)) return;
+
+        let args = [];
+        let props = [];
+
+        function push() {
+          if (!props.length) return;
+          args.push(t.objectExpression(props));
+          props = [];
+        }
+
+        for (let prop of (path.node.properties: Array)) {
+          if (t.isSpreadProperty(prop)) {
+            push();
+            args.push(prop.argument);
+          } else {
+            props.push(prop);
+          }
+        }
+
+        push();
+
+        if (!t.isObjectExpression(args[0])) {
+          args.unshift(t.objectExpression([]));
+        }
+
+        path.replaceWith(t.callExpression(file.addHelper("extends"), args));
+      }
     }
   };
 }