Clean api 1
Clean App : fix #9
- Ajout d'une entité entre party, user et secret.
- Modification de l'url du webservice joinUser fix #8
- Ajout crud User
Merge branch 'master' of https://github.com/SecretParty/serverPHP

Conflicts:
	src/SecretParty/Bundle/CoreBundle/Entity/Party.php
	src/SecretParty/Bundle/CoreBundle/Entity/User.php

Adn fix bug