Transifex Language Update - 17 languages, of which 2 new - Czech and Serbian
Merge branch 'fireflystorm-master'

Conflicts:
	app/src/main/res/values-de/strings.xml
	app/src/main/res/values-de/strings_activity_settings.xml
	app/src/main/res/values-pl/strings.xml
	app/src/main/res/values-pl/strings_activity_settings.xml
Fix translations