Add validation rules for Purchase.quantity
Move $user_roles assignment into AppController, set for every
default-layout page
Create and implement __getUserRoles()
Change 'instructor-in-training' to the more economical 'trainee'
Create getInstructorList()
Add margins to #PurchasePrepaidStudentReviewModuleForm fieldset
Add prepaid_student_review_module() and purchase-prepping logic
Initial commit

Purchasetime left uncompleted
Merge branch 'development'