[CMake] New version of FindGit.cmake compatible with FindSubversion.cmake

[Mateusz Loskot]

Folks,

Can we simply replace the basic version of FindGit.cmake module
available in the current release and Git repo with this version from Slicer?

https://github.com/Slicer/Slicer/blob/master/CMake/FindGit.cmake

Git is a tool of enormous importance nowadays, as Subversion is.
It's pity functionality of those two modules is kept in sync.

The Slicer's version has been referred several times here anyway.

Best regards,
-- 
Mateusz Loskot, http://mateusz.loskot.net