Refactored song loading
~9% faster and a bit more stable
Cover loading refactored
Fixed song loading check
Correct use of CoverTextureBig
Merge commit '6be397ac5b9b475b35c008e10a6464f7b33da752' into Better_note_timing

Conflicts:
	VocaluxeLib/Menu/SongMenu/CSong.cs
	VocaluxeLib/Menu/SongMenu/CSongMenuTileBoard.cs
Reflection Fix
Changed Note/Line adding to be sorted in all cases
Using binary search for note timing
Easier sing-note adding
Fix cover load counter
Merge branch 'Better_note_timing' into develop
fixed handling of CoverBig for category covers
Merge branch 'develop' of github.com:Vocaluxe/Vocaluxe into develop
Merge remote-tracking branch 'remotes/flokuep/develop' into develop
Refactored sorting and filtering
Further simplification of sorting/filtering
CHelper now fully static
Made CXMLReader.OpenFile private so factory method has to be used
Merge branch 'Flamefire/develop' into develop

Conflicts:
	VocaluxeLib/Menu/SongMenu/CSong.cs
Little Tweaks
Made the code checker a bit happier
Refactored AddTexture to remove duplicate code