Release of new version 4.4.7

Update UPGRADE_4_4.md

Release of new version 4.4.5

Newscoop 4.4.4 minor release

Release of new version 4.4.3

Release of new version 4.4.2

Newscoop 4.4.1 minor release

Newscoop 4.4 minor release

Merge branch 'playlists' of https://github.com/takeit/Newscoop into t…

…akeit-playlists

Newscoop 4.3.2 minor release