Added model diagram.
Adding problems controller
Merge branch 'dev_models' of https://github.com/alaashafaee/Coolsoft-14 into C3_Rami
Almost halfway through Issue #102
Merge branch 'master' into C3
Merge branch 'C3' into C3_Rami
Halfway through Issue #102
Removed test code from site controller. Issue #102
Updated models. Documented created methods. Issue #102
viewing problem and submit solution by mimi and saeed
Properly renamed problem_not_found view.
Resolved conflicts between saeed and mimi
Fixed HTML bug in views/problems/show.html.erb
Synch with C3: Resolved conflicts.
resolving all conflicts
Removed unused view.
Added 2 images to wiki.
Added rails guide images.
Compressed images for wiki.
Merge branch 'C3_Rami' of https://github.com/alaashafaee/Coolsoft-14 into C2_Rana

Conflicts:
	tutor/app/models/student.rb
	tutor/config/routes.rb~