Fixed FOSUser encoder error
Changing knpmenu usage to service,
according to https://github.com/KnpLabs/KnpMenuBundle/blob/master/Resources/doc/menu_service.md
Tidiing ACL, logout workaround
Changing menu according to permissions.
cf https://github.com/knplabs/KnpMenuBundle/issues/51
Copied base view from S2MBundle to UserBundle, to decouple them
setup and tested localisation