sections within a course, and a bunch of gradebook featrues
small fix to views/layout.html
Merge branch 'gradebook-dev' of github.com:presnick/runestone into presnick-gradebook-dev
make python the default language
Add section management controllers from Paul's branch
When a course is created, also add a default section for that course.
When a new user registers add them to the default section
Add a text entry box for section when user updates profile.