form refacto (TODO : attribute "type" for sympozer_collection_type in form type definition)
roles serialization
Merge remote-tracking branch 'origin/v1/forza-init' into v1/forza-init

Conflicts:
	src/fibe/CommunityBundle/Form/PersonType.php
	src/fibe/CommunityBundle/Form/PositionType.php
	sympozer-front/app/index.html