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