Add extended Fossil support
Add extended Fossil support

Fossil work should be complete, other than bug squashing.
Both Git and Fossil go through the same data interface now, and use the
same theming function! New VCS support (and the continued work on the
rest (hg, svn, bzr) should be "simple".

laurentbardin/liquidprompt,pkkolos/liquidprompt,nojhan/liquidprompt,jaesivsm/liquidprompt,milouse/liquidprompt