Merge branch 'master' of github.com:TalAter/annyang

Changed main file in bower.json

Bumped version to 2.5.0

Bumped version to v2.4.0

Bumped version number to 2.3.0

Bumped version to v2.2.1

Tweaked annyang.removeCallback() documentation

Bumped version number to 2.1.0

[Added] New method annyang.isListening()

Updated version number to 2.0.0

Bumped to version 1.6.0