Add ContestRules model and associate it with Contest.
Add Agreement model and tests.
Force contest entrants to agree to rules of contest before entry is allowed.
Add specs for AgreementsController and new functionality in EntriesController.
Add feature specs for admin section.
Update some specs.
Add placeholders to login page.
Add order number to entry form.
Remove jquery.fileupload-rails gem.
Add jQuery fileupload assets and move app-related assets to separate directory.
Add UUID to Entry.
Do not require place for Entry.
Implement initial entry creation, and add image uploading page.