Merge pull request #616 from firebase/jw-change-log-1-1-0

Change log for upcoming v1.1.0 release

Author: katowulf

changelog.txt

@@ -0,0 +1,6 @@
+feature - Improved performance (and fixed some timing bugs) by replacing custom internal batching logic with Angular's `$evalAsync()`.
+changed - The `new` keyword is now optional for services which use `$extend()` to add functionality to `$firebaseArray` and `$firebaseObject`.
+removed - Removed unnecessary debug logging in `$firebaseArray.$destroy()`.
+fixed - `$waitForAuth()` and `$requireAuth()` now properly detect authentication state changes.
+fixed - Fixed cases where `$$error()` was being called on `null` objects.
+fixed - Resolved inconsistent argument validation in `$changeEmail()` (thanks to @whitneyit).