Improve Docker 6

Improves the installation of MicadoWISE some more.

The immediate reason is that the version of black in the current docker image does not work properly.

Closes #250 (closed).

Other changes:

• Create micadowise.yml to upload to https://anaconda.org/omegacen/micadowise/ and refer to that in installation instructions.
• Add release instructions.
• Properly install just build package in Dockerfile.
• Add several things from #56 (closed) , adding vim/meld/man-db.
• Add X-forwarding to docker-compose file.
• Fix coverage by activating environment in conda_build job in .gitlab-ci.