Added client side validation check to image uploader
Added not_found method to redirect to 404
Redirect to 404 when submission is nil
Change the way system_role_id is assigned
Merge branch 'master' into jsyeo-image-upload-image-size
Dismiss modal and show alert
fix activity cache (cached timestamp previously )
add flag for eval coding question in submission grading
Merge pull request #43 from jsyeo/jsyeo-fix-method-not-found-ex

Fix method not found exception
Merge pull request #45 from jsyeo/jsyeo-dont-mass-assign-fix

Don't mass assign system_role_id in generated data
Merge pull request #46 from jsyeo/jsyeo-image-upload-image-size

Validate image and show alert
Merge branch 'development' of github.com:Coursemology/coursemology.org into dev/raymoond_dev
revert back commented out cache for tutor group
Merge branch 'development' of github.com:Coursemology/coursemology.org into Deploy
precompiled assets