Release Candidate

A few changes since beta 2 (with a few bc breaks)

• An adapter registry was implemented
• The ACL for the calendars were implemented
• Event and Calendar objects are now abstracts (and thus changed their names)
• The CalendarApiInterface now requests a getPermissions for a specific calendar
• It is now possible to set the permissions on the go after the Calendar was instanciated

On the google adapter, a few things have changed, like...

• The adapter is now injected into the apis
• The user associated to the used token is now fetchable (so now the token also requests the email scope)
• A user may have more than one email

That's all folks !