Merge branch 'share_api'

apps/calendar/appinfo/app.php

apps/calendar/js/loader.js

apps/calendar/lib/share.php

apps/calendar/lib/share/calendar.php

apps/calendar/lib/share/event.php

apps/calendar/lib/share_backend.php

apps/calendar/templates/part.choosecalendar.rowfields.php

apps/contacts/appinfo/app.php

apps/contacts/css/contacts.css

apps/contacts/js/loader.js

apps/contacts/js/settings.js

apps/contacts/lib/addressbook.php

apps/contacts/lib/app.php

apps/contacts/lib/share/addressbook.php

apps/contacts/lib/share/contact.php

apps/contacts/lib/vcard.php

apps/contacts/templates/settings.php

apps/files/index.php

apps/files/js/fileactions.js

apps/files/js/files.js