refs https://github.com/TryGhost/Toolbox/issues/95
- The uploaded media thumbnail name should have a "_thumb" postfix to be able to distinguish thumbnails from other files. This can be handy if we decide to store them in a different location in the future.
refs https://github.com/TryGhost/Toolbox/issues/95
- Each media file quires a thumbnail and these changes provide a capability to upload them along with media files.
- The thumbnail file is always required and has to be the format of already supported image formats
- The thumbnail should be uploaded as a part of "thumbnail" attachment in the request
- The regression tests added with this changeset will be claened up and moved to unit-tests (this is a dirty-but-working version!)
- The thumbnail always gets a name of the uploaded media file and keeps it's own extension.
- The thumbnails is accessible under the url present in the "thumbnail_url" reponse field