working on the coloring
added support for fg and bg coloring in the prompt, using %f{color_name} %F and %b
fixed an annoying bug with readline misscalculating the strlen with escape codes; fixed by enclosing them between 'x01' and 'x02'
cleanup
hacked in support to show the current git branch if any with %g :-)
Merge pull request #61 from jovanbulck/coloring

Coloring