Enhances detached head display in git segment.
Enhances git segment with untracked, notstaged, staged and conflicted files.
Adds Color variables for the git segment.
Fixes bug causing no display of status when head was detached.
Fixes bug since Python 2.7.6 (un-greedy quantifiers in the regex).
Moving cwd_simple.py to the right place
Merge remote-tracking branch 'MartinWetterwald/feature/gitsegment'
Fix powerline-shell name in warn()
Error handling in cwd_simple