Features in Games
Implement multiple backgrounds for SVG themes.
The theme loader will look for background0 ... backgroundN and the game will use a new background for each new level, modulo the background number.
There is a bug left in the background loading, where the background may change when reloadimg I will haqve to look into that.
Fix a crash while resizing the window too small by setting a minimum size for the KGrCanvas class.