Bumping version 0.3.2.1
Implemented assertion based on https://github.com/gitpython-developers/GitPython/pull/143

The assertion will trigger, which shows that we are still getting thigs slightly wrong.
For now, we are better off without.
Removed assertion inserted in previous commit
Merge branch 'migurski-patch-1' into 0.3

Handles https://github.com/gitpython-developers/GitPython/pull/143