Use APPEND_SLASH

Closes #180. Commits for fixing all the issues that will inevitably
arise as a result of this change are on the way.
Remove introductory copy on homepage
Update copy in UCP overview page
Update default ordering for Course model

Now uses the department's short name rather than the primary key.
Update link to McGill course calendar to 2013-2014
Remove non-functional RSS feed link

wtf? how long has that been there for no purpose at all?
Update copy on 404 page
Remove legacy faculty/department URL mappings

Requires fixing the get_image methods on Faculty and Department as well
Update URLs to use a slash at the end

See #180.
Improve faculty, department browse pages

Both pages are still fairly useless tho
Clean up code formatting in views/courses.py

See #138.
Fix trailing whitespace error
Remove non-functioning link in page create popup
Add back professor view URL mapping

ಠ_ಠ ಠ_ಠ ಠ_ಠ

that'll teach me to not write ambiguous comments in the future
Add link to professor page on course overview page