Bug fixes:
* Fix bug where exercises wouldn't get saved (0958922d)

Improvements:
* Use extended FAB buttons for ease of use (d3fb6946)

Features:
* Add partial translations for 13 languages (WIP)

Code cleanup:
* Use MainActivity ambient instead of util classes (7000266b, 14aae8d0)
* Add AboutSplitfitViewModel (14aae8d0)
* Cancel / finish workout from ViewModel (dfbe9a5e)
* Decouple composables (16fe70d6)o

Misc:
* Update README
* Update Screenshots
