Removed dedicated models for computing and user conf, and merged it in the models themselves. Added support for the groups. Minor fixes and improvements.

Refactored the computing type by adding the access mode. Refactored the computing manager classes. Added the "access_mode" field and related sys and user conf in the Computing model.

Added the manager and conf properties to the Computing class. Global computing conf refactoring. Minor fixes.

Added support for uWSGI together with static files serivng. Added the DJANGO_DEV_SERVER env var to switch between the dev server and uWSGI. Small changes in error handling to play nicer with logs when not running in dev mode.

Parametrised webapp host+port and local docker registry host+port. Moved all data (registry+shared) in the data_rosetta folder.