New colormap features

I can't remember exactly how many times I was asked to improve the colormap editor for raster maps.

For several reasons now I had to, so lucky the patient :)

This is how it looks now (in the next build):

We have the usual load from map, but now there is a consistent import and export possibility for colortables in GRASS format.




Also there is a combobox containing predefined colotables:




So if I choose the elevation colortable, I get:


When the colortable is chosen, the colorrules panel in the upper part updates itself, so it would be possible to modify that.