First pass at week-2 group projects list

* Extract Working Agreements to their own file
* Fix line width
* Fix whitespace in week 1
Fixed merge conflict with group-projects.md
Merge branch 'master' into gs-add-week-2-group-project-names

Conflicts:
	week-2/group-projects.md
Merge pull request #90 from gopher-snakes-2013/gs-add-week-2-group-project-names

First pass at week-2 group projects list