Merge topic 'doc-developer-git-version'

ab5456f4 Documentation: Update required Git version to 1.7.2
Acked-by: Kitware Robot <kwrobot@kitware.com>
Acked-by: Ben Boeckel <ben.boeckel@kitware.com>
Reviewed-by: Utkarsh Ayachit <utkarsh.ayachit@kitware.com>
Merge-request: !104

Documentation/dev/git/README.md

@@ -8,7 +8,7 @@ Main Tasks
 ----------
 
 * [Install Git](http://public.kitware.com/Wiki/Git/Download) -
-  Git 1.6.6 or greater is preferred (required for development)
+  Git 1.7.2 or greater is preferred (required for development)
 
 * [Download VTK](download.md) - Users start here