implemented update() for both collection.save() and model.save()
implemented update() for both collection.save() and model.save()

jonboiser/content-curation,aronasorman/content-curation,jonboiser/content-curation,fle-internal/content-curation,jonboiser/content-curation,jayoshih/content-curation,aronasorman/content-curation,fle-internal/content-curation,jonboiser/content-curation,jayoshih/content-curation,DXCanas/content-curation,DXCanas/content-curation,jayoshih/content-curation,fle-internal/content-curation,DXCanas/content-curation,DXCanas/content-curation,aronasorman/content-curation,jayoshih/content-curation,fle-internal/content-curation