this is a test
Cleanup so that the test suite would run
Changed the default for a missing
previous session folder from
os.makedirs(session_folder)
to tempfile.mkdtemp(prefix="SAHM_session_dir_")

This corrects a bug Nick was getting at
CSU when he had a session folder on a disconnected drive.
Merge branch 'master' of git@github.com:ColinTalbert/sahm.git