FOSUserBundle added to composer.json
FOSUserBundle configured.

A new bundle MGPeecSoUserBundle was created to extend the User class of the FOSUserBundle.
Group entity created
MGPeecSoBackendBundle created
New bundles containing jQuery and Bootstrap Twitter
/web/js and /web/css directories excluded from git
Fluid layout implementation for the backend interface
Fix body padding
Users list in the backend area.

Routing files refactored.