Fix creating new project

The mapping to Fedora and Debian is no longer required.
Add a method to check new releases made on a given project
The cancel links changes if you add a new project or edit an existing one
Meta data in createdb
Add cron job to update the release information for each projects of cnucnu
Fix displaying the version retrieved when we test a project
Couple of typo

- Move /api/versions to /api/version as it is used to get the versions of a single project
- The configuration key for the admins is CNUCNU_WEB_ADMINS not CNUCNU_ADMINS
Only admins are allowed to delete a project
Make of Ralph an admin by default