port to containedin and drop the cssColors cluster
make containedin all relevant groups
bail without compiling if inapplicable
pull GUI check into initialisations
speed up init by doing more per keypress
rename MatchColorValue to CreateSynMatch
rename HexFor*Value to *2Color
move everything into a more logical order
fix wrong name of fg_color_calc
remove a pass from ParseScreen
remove another pass from ParseScreen
remove another pass and refactor regexp
use single autocommand