Merge branch 'release-20' into beta
Merge branch 'fix-20.0.1' into beta
Enable proguard with appcompat MenuBuilder workaround.

- https://github.com/UweTrottmann/SeriesGuideInternal/issues/222
Prepare version 20.1.0-beta1.
Keep line numbers when running proguard.

- Better logs for Crashlytics.
Prepare version 20.1.0-beta2.
Prepare version 20.1.0.
Change log for v20.1.0.
Merge branch 'release-20.1'