Replace over use of grep/cut with sed or awk, globally reduce number of fossil call
Forgot one _lp_escape
Fossil MARK_UNTRACKED is now colorized as for git or hg support
Fossil support: more cleanup
Fix tabs
Fossil: use internal diff (fossil diff -i)

Thanks to @sekiroh for the tip...
Merge branch 'refactor/fossil' into develop

Close #274
https://github.com/nojhan/liquidprompt/pull/274