Close #310. Crop editing works with multiple images

Now to get this functionality going with stages, guides, etc.
Merge branch 'master' of https://github.com/openfarmcc/OpenFarm into move-crop-to-api
Change gif image because that vcr file is way too large
t push origin masterMerge branch 'simonv3-move-crop-to-api'
Merge branch 'master' of https://github.com/openfarmcc/OpenFarm