Added role field to student
Limit student access to index edit/delete options
Add block page

Users without priveleges will be redirected here.
Add permissions for edit

Added the require_admin filter to all controllers
Added admin priveleges for edit button
Refine admin
broken add_students page
Updated student model and controller

Changed what the '_id' pointed to to fix URLs
Removed unnecessary before_filters from student controller
Small adjustments to student views
Course URL points to call number