update documentation for options
update documentation for options

therumpusroom/imageproxy,gcg/imageproxy,laher/imageproxy,zischwartz/imageproxy,betabrand/imageproxy,WatchBeam/imageproxy,Toubib/imageproxy,victortrac/imageproxy,wojtekzw/imageproxy,wojtekzw/imageproxy,victortrac/imageproxy,sevki/imageproxy,willnorris/imageproxy,Hapara/imageproxy,zischwartz/imageproxy,sevki/imageproxy,betabrand/imageproxy,runemadsen/imageproxy,WatchBeam/imageproxy,runemadsen/imageproxy,willnorris/imageproxy,Toubib/imageproxy