Issue #1: Renamed git-branchhealth python module to BranchHealth for more clarity in setup script.
Issue #1: Forced usage information to print if invalid command line parameters were detected.
Issue #1: Renamed git-branchhealth directory to gitbranchhealth, since setuptools doesn't seem to like names with a hyphen.
Issue #1: Added setup.py and created release version 1.0.0.
Added a .gitignore file to ignore compiled python files.