Use a proxy class to interface with Sabre_VObject classes

apps/calendar/ajax/editevent.php

apps/calendar/ajax/editeventform.php

apps/calendar/ajax/events.php

apps/calendar/ajax/moveevent.php

apps/calendar/lib/object.php

apps/contacts/ajax/addcard.php

apps/contacts/ajax/addproperty.php

apps/contacts/ajax/deleteproperty.php

apps/contacts/ajax/getdetails.php

apps/contacts/ajax/setproperty.php

apps/contacts/ajax/showsetproperty.php

apps/contacts/index.php

apps/contacts/lib/vcard.php

apps/contacts/photo.php

lib/vobject.php