2.2.* Version of js lib and bower asset management

Added language dependent asset registration.

Beta that works fine with yii2 beta

Hi,

I just made like an "release" that works fine with the beta of yii2, that's why it's called beta! ;)
And I'm disbuting about myself to upgrade full calendar to version 2.0.dev which can be a risk for users too...

Cheers Phil

Upgraded fullcalendar to 2.2.5

Due to updated original libs, this will include them

2.1.1

Release using the arshaw library version 2.1.1