first draft of the project-metadata model
Merge branch 'master' into project-metadata
Merge branch 'master' into project-metadata
Update to latest Core.
Add margin to the rule demo panel
Orange badge for email notifications too
Update the project-metadata model

Includes:
- Updated models
- Service search/business methods
- Bindings
- Comparator for ProjectVersion based on what we did for ArtifactVersion
Rename advisable to recommended artifact for the sake of consistency
Fix colspan
Use of ArtifactKey instead of a StringBuilder for consistency
Workaround for the ProviderManager injection
New core entities for the project-metadata model

Missed them in the first commit...
Add UI for the project-metadata model

Includes:
- Project pages (list, description)
- New panels for the artifact description page
- English trads (I'll be translating it in french next monday)
Add ProjectLicense SQL insert script
Use AND in artifact search

Fixes #16.
Update french trads
Add changelog link on project/artifact version UI
Fix edit permission on the project list page
Fix project synchronization
Use of CSS visibility instead of .opacity