- finished implementing forms
- fixed form reset when clicking on new
- fixed responsive for select all checkbox and toggle item details
- refactored listing items' actions
- added Trash action
- cleaned up validations on models
- fixed syntax
- fixed tests
- improved Listing in order to make it more DRY
- form builder with all field types
- added support for data array in ValidModel->set()
- updated models to comply with Listing & Form methods
- added a Listing Handler class to take care of listing params
- added status column to Subscriber
- added specific methods to both Newsletter & Subscriber models for listing
