Fix #664: Pip should install GitPython 0.2.x or higher.

By default, pip installs GitPython version 0.1.7

% pip install GitPython
Downloading/unpacking GitPython
  Downloading GitPython-0.1.7.tar.gz
  Running setup.py egg_info for package GitPython
    
Installing collected packages: GitPython
  Running setup.py install for GitPython
    
Successfully installed GitPython
Cleaning up...

Which among other things causes the "util" issue, doesn't have RemoteProgress etc,.

Thus, version 0.2.0-beta1 of GitPython should be specified as the lowest requirement for Pip. Double quotes are specified as the > sign is a Bash special character.