ported the rest of the OC_Helper calls

apps/bookmarks/appinfo/app.php

apps/calendar/appinfo/app.php

apps/calendar/templates/calendar.php

apps/contacts/ajax/importaddressbook.php

apps/contacts/ajax/loadcard.php

apps/contacts/appinfo/app.php

apps/contacts/index.php

apps/contacts/photo.php

apps/contacts/thumbnail.php

apps/external/appinfo/app.php

apps/files/admin.php

apps/files/ajax/upload.php

apps/files/appinfo/app.php

apps/files/index.php

apps/files_archive/lib/storage.php

apps/files_archive/lib/tar.php

apps/files_archive/lib/zip.php

apps/files_archive/tests/archive.php

apps/files_archive/tests/storage.php

apps/files_archive/tests/tar.php