Converted the Colors.h code to Qt

The colors on colors.h were done to fill a special
struct by Subsurface - I removed that structure and
replaced the code that generated the map of colors
to a QMap. I know that this changes are not very
'welcomed', but C++ has issues on creating & initializing
complex static members, this was the best way that I could
think of.

Signed-off-by: Tomaz Canabrava <tcanabrava@kde.org>