When creating a project, we no longer define the version_url or the regex
Adjust the model

- Include the function used to map a project to a distribution package (or 
update said mapping)
- Rework the DB model
  - Rename the table ProjectPackage into PackageRegex
  - Adjust the methods
  - Adjust the Packages table
Adjust the controller the new DB model and rely on project identifier rather than name
Adjust the templates to link using project.id rather than project.name

Adjust it as well for the new DB model
Add template to remove a specific regex off a project
Add method to remove a regex off a package and fix links to use project_id instead of project_name
Add first unit-tests
Update fedmsg notification DB logging message