Add excuse model
Add attendance_is to excuse model
Add associations for excuse
Add excuses controller and decorator
Add routes for excuses
Add view for excuses
Add submitting new excuse to /excuses
Add validations to excuse
Include application helper in applicatin controller
Add lengt validation for excuse reason
Change formatting of excuse listing table
Add excuse index page to feature links
Add excuse create controller action
Add excuse_id to attendance
Add controller action to process excuses
Add views for pending excuses
Add pending excuses link to dashboard feature list
Add validation for attendance_id
Fix hound issues
Merge pull request #48 from valleyjo/av/excuses

Add excuses. Close #29.