[Inkscape-devel] color selector changes

Well... I just checked in some changes for the color selector. It needs a little more polish (mode, CMYK types, and the popup to select subsets of possible pickers) but should be ready for some initial testing and use.

As part of it, I was simplifying the pickers to juse use SPColor objects instead of all the overloaded different component primitive types. This might be a good thing to continue... as it could facilitate moving to better color, custom spot color, etc.

Oh, and the 'API' (as it were) for creating new pickers will probably undergo a little revision. At the moment the gtkcolorselector might be an interesting place to start.