[API] adding routing and actions for the api
[.gitignore] Update !
[ApiBundle] Refactoring from VdmBundle to ApiBundle
[api] installation + configuration -> FOSRestBundle + JMSSerializerBundle
[Api] adding Routes
[Api] implementation of getPostsAction() and getPostAction()
[Command] refactoring -> to increase performance
[Api] add filters to api/posts Routes