Overhaul image upload endpoint. Restrict accepted MIME types and make sure they are set on S3. Do not allow upload of images with conflicting hashes. Process uploaded images in parallel. (#4)
Move uploadImage out of endpoints. Move /upload/img to /img.
Take a project when uploading images. Project should be supplied as a form encoded parameter of imagekey_project. Closes #4.
Merge branch 'betterupload'