Update butterknife to 6.0.0.
Update butterknife to 6.0.0.

- https://github.com/JakeWharton/butterknife/blob/master/CHANGELOG.md#version-600-2014-10-27

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