qgrit: graphical git rebase -i helper

Hi,

i wrote a small tool to support users during git rebase -i.
by presenting commits in a graphical interface.
(usable with git 1.7.8.rc0 and up)

Lacking a better idea i named it "qgrit" :-)
(Qt git rebase --interactive tool)

Notable features:
* Reorder commits by drag drop and up/down buttons
* Select actions from a combo box
* Undo reordering function
* Shows full commit message, not only title line
* Works on mingw (auto detects git path)
* Easy setup as rebase -i editor: run qgrit, click "Install qgrit" button
 (this also detects too old git versions)

For more information, screenshots and source code see:
https://github.com/qgrit/qgrit/wiki

Ideas for improvements, bugreports welcome!

Have fun,
Greetings Peter