Split OC_Contacts_Addressbook in _Addressbook and _VCard

apps/contacts/ajax/addcard.php

apps/contacts/ajax/addproperty.php

apps/contacts/ajax/deletebook.php

apps/contacts/ajax/deletecard.php

apps/contacts/ajax/deleteproperty.php

apps/contacts/ajax/getdetails.php

apps/contacts/ajax/setproperty.php

apps/contacts/ajax/showaddcard.php

apps/contacts/ajax/showaddproperty.php

apps/contacts/ajax/showsetproperty.php

apps/contacts/appinfo/app.php

apps/contacts/index.php

apps/contacts/lib/addressbook.php

apps/contacts/lib/connector_sabre.php

apps/contacts/lib/hooks.php

apps/contacts/lib/vcard.php

apps/contacts/photo.php