c3s2 mostly done
Finish c3s2
Last few bits on c3s2
Fixed a couple of typos in c3s2
Changes to c1s2, stripping out all the juicy git bits.
Fix typo
Add setting up domain name to homework exercise
Correct typo
Add basic git diagram
Rework course 1 session 3
Updates to sessions c1s3, c1s4 and add ladies night to c3s2
Course 3, session 3
Merge branch 'master' of github.com:code61/short_format_notes

Conflicts:
	css/main.css