Create README.md
Decoupled Security,

changed all basic services so that the Security Bundle can be used or not,
Also configured the bundle to require only a addition to the routing to be fonctionnal,
Merge branch 'master' of github.com:devlabmtl/haven-core
Changes to the composer

Test one of using psr4 and moving to Haven/Bundle/CoreBundle
fix psr4
fix psr4 again
PSR4
PSR4