Releasing docs: Some minor cleanups
Releasing docs: Minor cleanups
Automatically choose the development status on build
Add 1.13.0-rc1 release notes
Bump up version number for 1.13.0-rc1
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
Docs: Put the release notes before the changelog
Release notes: Minor cleanups

* Add note about checking changelog for older releases
* Remove reference to SourceForge
Release notes: Add the template for the next release