[Deployment] Updated legacy application

Updated the layout to support the new design and script.
Dead links have been removed, as well as ads.
The old analytics has been replaced by the new one.

Pages and small amount of code relative to user management have been
removed.
[Deployment] Replaced layout's tabs by 4 spaces
[Deploy] Removed unused style
[Deploymnet] Added more criterion to user registration
[Deployment] Improved translations
[Deployment] Installed Capifony
Merge branch 'feature/deployment' into develop