Revert "Automatically choose the development status on build"

This reverts commit 4bc736c786a544602cebb95259d803936b94be32.
Adjust functional tests after bumping up the release
Remove test-publish-pypi since it doesn't work
Releasing docs: Major cleanup

This includes a lot of changes:

* Removed SourceForge sections and mentions
* Altered the order of some sections (publish docs before releasing)
* Added some extra notes
* Divided the tasks into three groups (create package, release, cleanups)
* Removed the initial summary
* Altered GitHub releasing to just include a short description