More info about Git repository added
Now, staged, unstaged and untracked files count can be shown in themes
Added more Git repository info to Powerline theme
Added more Git repository info to Powerline Plain theme
Include latest changes from powerline into powerline-plain
Merge pull request #387 from edubxb/more-git-info

More Git repository info available for themes
Merge remote-tracking branch 'upstream/master'