2.0.0-alpha1

• Updated many translations.
• Changed the way to pass the email to the page asking to check the email to avoid issues with non-blocking sessions.
• Changed the fos_user_security_check route to enforce POST.
• Removed the deprecated UserManager and GroupManager classes for the different Doctrine implementations.
• [BC break] Refactored the structure of controller to dispatch events instead of using form handlers.
• Removed all form handlers.
• [BC break] Changed Datetime properties of default User entity that were nullable to default to null when no value supplied.
• [BC break] Updated schema.xml for Propel BaseUser class to allow nullable and typehint accordingly.