Merged in testing from 2013-04-manchester
Merged in testing from 2013-04-egi-forum
Added links to version control and testing slides and READMEs
Removed EGI link. Added slide on what will be covered
Replaced full text with cheat sheet
Replaced full text with cheat sheet
Added needed linebreaks
Mild formatting tweaks
Replaced full text with cheat sheet
Added numpy and nose links. Sorted formatting
Sorted more formatting
cheat -> crib, added links to references
Small tweaks in headings for consistency
Shell crib sheet and material
Shell crib sheet and material
Added link to shell/README.md
Formatting tweaks. Added Link to shell lectures
Formatting tweaks.
Added Knuth and McIlroy example
Fixed typo