Update butterknife to 5.1.0.
Update butterknife to 5.1.0.

- https://github.com/UweTrottmann/SeriesGuideInternal/issues/41
- https://github.com/JakeWharton/butterknife/blob/master/CHANGELOG.md#version-510-2014-05-20

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