Some very basic colour scripting for the menus has been implemented, but
there's much further to go. An xml file containig colour information has
been added, in addition to a few functions to load and parse it, more
global 'glColours' to hold its information, and hooks throughout the
toolkit classes to use these colours. So far only hard scripted colours
have been replaced; the plan is to eventually incorporate all of the colours
into this framework, though.