Removing GitPython from install_requires and replacing with sh==1.08
General tidy up
Renamed git_vcs to git and removed GitPython for sh
Fixed tests to work with sh.git
Moving imports so install / tests work
Fixing git import
Hopefully fixing testing issue on travis where git email and name config vars are missing
Use --global instead of --local
Should make the git commit work?
If on Travis set git name / email
Merge pull request #21 from krak3n/feature/issue-20

Feature/issue 20 closes #20 and references #5