Added initial python materials
Deleted unnecessary ipynb files as well as some renaming
Updates to intro python lecture
Cleaned up the intro python lecture. First draft of all lectures now ready.
Merge pull request #4 from jensv/gh-pages

Updates to shell lectures
Merge pull request #5 from choldgraf/chris_python_materials

Chris python materials
added git material from novice section of swcarpentry/bc