Installing mauve-py dependency using pip fails, at least on OS X Mavericks

[glebkuznetsov]

progressiveMauve can't find certain dylibs when mauve-py is installed using pip.

Instead, the following process for installing mauve-py works:

1. Git clone mauve-py repo.
2. Activate venv for mascpcr project.
3. Navigate to mauve-py dir and run python setup.py install.