*Changes:*
* Hide workers list if there are many than 8 workers
* Properly align page (move workers toggle to header)
* Add a link to rq-dashboard-on-heroku (thanks Paul Melnikow)
* Update dependencies (thanks dependabot)
* Expose dashboard HTTP port 9181 in Dockerfile (thanks Enrico)
* Switch to pytest for running tests
* Add worker's RQ and Python versions to dashboard (for RQ > 1.1, currently from master)
* Convert README to markdown
* Set up test runs against different RQ versions
* Remove requirements.in, we are using dependabot now
* Use rq 1.1.0 by default (in requirements.txt)
* Add favicon