Devel

This is a rather large branch it contains

- Improvements on the front page
- Adjust uploaded filename adding the user's name in the filename thus allowing multiple file with the same name from different person
- Add a submission date from which people can start submitting artwork (submission ends when the voting period starts)
- Improve the forms by adding a small red '*' near the mandatory fields
- Add a field to the original artwork in the form in case the submitted isn't the author of the artwork
- Make the submitter contain both username and email information
- Fixes to the unit-tests