Merge pull request #65 in CATS/pyclowder2 from CATS-872-core-extractors-need-to-be-ported-to-pyclowder-2 to develop
* commit '64122109cec2f510038417a4ec0c3b445cfb4aff':
cleanup docker builds - added a simple extractor that works on binary files and creates image thumbnail, image preview and preview - docker.sh simplified now to be used when pushing tags/releases - split docker.sh into release.sh and docker.sh. docker.sh will build docker containers, release.sh will do the actual push to docker hub.
cleanup docker builds - added a simple extractor that works on binary files and creates image thumbnail, image preview and preview - docker.sh simplified now to be used when pushing tags/releases - split docker.sh into release.sh and docker.sh. docker.sh will build docker containers, release.sh will do the actual push to docker hub.