Fix vitorfs#183 from PR vitorfs#194 and vitorfs#195 from @bobrik-matej

Fixing minor bugs and pending issues.

Minor bug fixing, code base update.

Fixing minor bugs and improving quality of the code. Fix vitorfs#171

Fixing Travis tests and deleting some files.

Fixing some issues with TravisCI testing process.

Fixing TravisCI errors.

This version updates Python and brings home the most recent changes i…

…ncluded with the language and its requirements. This version is not backwards compatible.

Fixes an issue with the asgi_redis package, created because django-ch…

…annels and its related projects dropped Python 2 and Django<2.x support.

The package django-autoslug has been dropped, and it had to be replaced.