Fix delay test
Don't generate an existing cover
Handle invalid and not existing cover themes
Merge pull request #124 from flokuep/develop

Added translators to credits. It's now easy to add new translators/langu...
Simplify SelectSlides and fix a couple of problems there
Add class for calculating combinations and a unitTest
FIx crashes on close before covers finished loading
Refactor PartyModes in preparation for a more unified name selection and maybe config
Rewrite round generation and add unit test
Use new serializer for theme loading
Fix some bugs during load
Fix graphic glitches with sing notes
Fix jumping note drawing
Merge branch 'develop' of git://github.com/Vocaluxe/Vocaluxe into develop
Merge pull request #125 from Flamefire/develop

Develop
Fixed scoring in challenge-modes.
Updated translations.