Update installation instructions
Merge pull request #4 from jkitzes/installation_fixes

Update installation instructions
Fix link to the Windows setup script.
Python materials from 2013 UCB and LBL bootcamps by @jkitzes
Add header to testing lesson
Add header to reproducible workflow lesson
Remove redundant titles

Conflicts:
	lessons/jk-git/tutorial.md
	lessons/jk-python/README.md
Fix dir structure code block chars
Add shell tutorial
Add supporting file links to testing lesson
Update reproducible workflow lesson