Merge pull request #3 from mdipierro/master

update
=Class video chat members info.
Adding myself to CONTRIBUTORS file
added Saher Talaat to the Calendar group
removed backup contibutors file
Added Cindy Choe to the calendar group
removed redudant jquery library and unnecessary session files
added .gitignore file so that sessions and errors are not tracked by git
Merge branch 'msworkspace'
bringing contributors up to date
added databases and logs to gitignore
Merge branch 'msworkspace'
merged
Merge branch 'basiamk-master'
merged
Merge branch 'MSherry24-workingset'
Update CONTRIBUTORS
Removed my name from the CONTRIBUTORS file

I thought I was signing up to work on the calendar team. Apparently I
misunderstood what we were doing. I have contacted the leader of that
team.
Updated authorization, added utility function

- Moved roles into the auth_group table.
- Added code to automatically populate the auth_group table with
default roles.
- Added code to add all users except user 1 to the auth_membership
table as student.
 - Updated methods in default.py to use the new auth_membership
relations.
- Added decorators to methods in default.py to enforce authorization.
- Updated view default/course.html to use the new auth_group.role
value, as my updates broke it.
Merging from master project