Allow alerts to be closed
Fix bug -- assure alert classes enclosed in quotes
Revert "Remove misnamed controller"

This reverts commit e04bafe42e6487caaf4bff6587114668aedf500b.
Remove useless files for old misnamed assignment
Add tests for authentication for assignments
Check for login and correct user for assignment actions
Sign in as the teacher before testing assignment pages
Refactor: DRY up tests and move tests for enrollment button into course_pages_spec
Add specs for due_time
Add a due_time column to assignments
Update factories to have a due_time
Validate for presence of due_time
Show when an assignment is due
Test for open? and closed?
Add open? and closed? for assignments
Have the new and edit forms include the date as a field
Update tests for new forms, and test for displaying of due_time
Add a little thing to show how much time is left for an assignment
Update tests to use a datepicker

A datepicker is in fact a JavaScript-boosted text_field, so for tests
it's enough just to fill it in with what the datepicker would have
given back anyhow.
Add boostrap-picker