Remove routes which aren't needed
Remove views which aren't used
Remove Credential model
Remove coffeescript files which aren't being used
Remove scss files which aren't used
Correct an error in Instructor dashboard
-it was incorrectly displaying all customers, even those who haven't purchased
any lessons with the instructor who is logged in
-it is now only listing customers who have purchased lessons with the
instructor who is currently logged in
Add class to dashboard heading to horizontally center it
Add unordered list to partial template _contact.html.erb
-Remove html table
Set width of table columns