Improvment for git

* highlight for untracked files in commit
* rebase fixes (noop, commit ids, colors)
* .gitconfig syntax
Syntax for markdown format
More syntax files from craigbarnes/nanorc
Improved git

* added branch info
* added coloring for Changes to... sections
* better changes id in rebase
Fix previous commit
Merge pull request #11 from mariuszs/master

Improvment for GIT