Updated wxColour for handling Colormaps and ref couting.
Updated wxClientDC et al. for conforming to wxGTK. Many
tricky parts, particularly the bitmap drawing and
blitting is still missing.
Any sample crashes now for some reason with an X error.
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@14136 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775