image transformation improvements
image transformation improvements

- switch to disintegration/imaging library, which supports more of the
  transformations I want to add
- pass image through untouched if provided Options are empty

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