bundle update
Format
Rename @attributes to @attribute_names

Rename @attributes to @attribute_names and @<something>_attributes to @<something>_attribute_names.
Rename @.._associations to @.._associaiton_names
Do not use before_filter to simply find a record
Custom form builder: do not select among >15
Fix GuestEntry-MembershipPurchase association
Use strings instead of symbols for params keys

Use strings instead of symbols for params keys in MembersController and InstructorsController.
Edit controller tests
Add controller tests
Remove 'strong_parameters' gem

Using custom functions to process parameters seems more reasonable and flexible.