Pin version of gitpython to 0.3.6.
Pin version of gitpython to 0.3.6.

gitpython's api seems to change frequently. We need to be able
to fetch the sha1 hash of the most recent commit. setup.py is tested
with gitpython 0.3.6.

datamicroscopes/common,datamicroscopes/common,datamicroscopes/common,datamicroscopes/common