Updated the stylesheets to get rid of the annoying hover on header buttons. Centered and colored alerts.
Cleaned up submit_submission page.
Added a 'Create new Course' link to the header.
Centered the alerts in the application header.
Built out an intro page to explain the app and link to the source.
Made the submit assignment button context aware in enrolled_student_assignments/show.
Added a context aware 'submit assignment' button to each assignment in the enrolled_student_assignments/index page.
Converted the app to store files on S3 as opposed to locally.