Upgrade to AngularFire 0.9.1 (new auth methods)

This can't be merged until AngularFire 0.9.1 is pushed to bower/npm.

What is in this PR:
  - fixes two bugs (#13, #14)
  - implements AngularFire 0.9.1
  - adds Firebase 1.1.x auth methods
  - uses Firebase's new changeEmail method
  - merged latest generator-angular fixes