Update eventbus to 2.2.1.
Update eventbus to 2.2.1.

- https://github.com/greenrobot/EventBus#v221-2014-05-21-bug-fix-release

artemnikitin/SeriesGuide,UweTrottmann/SeriesGuide,0359xiaodong/SeriesGuide,epiphany27/SeriesGuide,r00t-user/SeriesGuide,hoanganhx86/SeriesGuide,UweTrottmann/SeriesGuide