Add course details
Add isFull()
Pass $is_full to register view
Use Course::isFull() in complete_registration()
Handle full class condition
Fix flash message text in complete_registration()
Add validation rule for Course.cost
Change validation for max_participants and cost to naturalNumber
Add cost fields
Add beforeValidate() and isWholeNumber() to handle cost conversion
Fix function declarations
Create afterFind and handle cost conversion
Style cost fields in course form
Change cost field names
Fix cost field widths
Increase Course.cost_dollars maxlength
Set Course.cost_dollars and Course.cost_cents in afterFind()
Set initial dollars and cents values in add()
Add missing endtag
Fix beforeValidate()