Add handler for OPTIONS to ZipContentView to support CORS preflight RQs
Add handler for OPTIONS to ZipContentView to support CORS preflight RQs

learningequality/kolibri,mrpau/kolibri,jonboiser/kolibri,benjaoming/kolibri,lyw07/kolibri,benjaoming/kolibri,jonboiser/kolibri,lyw07/kolibri,jonboiser/kolibri,learningequality/kolibri,indirectlylit/kolibri,lyw07/kolibri,learningequality/kolibri,indirectlylit/kolibri,benjaoming/kolibri,benjaoming/kolibri,indirectlylit/kolibri,learningequality/kolibri,lyw07/kolibri,DXCanas/kolibri,indirectlylit/kolibri,DXCanas/kolibri,DXCanas/kolibri,mrpau/kolibri,mrpau/kolibri,jonboiser/kolibri,DXCanas/kolibri,mrpau/kolibri