Replaced button images with Paths to fix aliasing
Only updates song once all DLCs open
Retargeted to .NET 4.0
Hardcoded CallerMemberName for .NET 4.0
Fixed missing notes due to foreach closure bug

http://blogs.msdn.com/b/ericlippert/archive/2009/11/12/closing-over-the-loop-variable-considered-harmful.aspx

Added test project