Proguard: keep exceptions.
Proguard: keep exceptions.

- Remove duplicate Signatures keep option. Now actually solves throws declarations getting removed.

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