Add FOSUserBundle using composer
Enable the FOSUserBundle bundle
Create a Trcks/UserBundle
Create a basic User entity
Configure routing and security files for FOSUserBundle
Extend User Entity
Create MusicBundle
Create basic music related entities
Fix User Entity to work as intended.

Previously, it was missing the parent::__construct(), as well as extending the wrong class for this version of FOSUserBundle.
Merge branch 'auth' into music