nativeColor and endianness

[Patrick Julien]

>
> Still, I'd like to have a bit more structure in KisPainter. It is in danger
> of becoming a very large class -- perhaps the various operations could be
> classes on their own, like in Java2D (which is a mess, like all Java API's,
> but contains some nice ideas). But I'm not going to worry about that; first
> things first. And it seems that that's going to be compositing per colour
> strategy.

I don't remember Java2D, however, the point with KisPainter is that it should 
only primitives has methods.  

More complex operations should be visitor on KisPainter.