Fix getting language for uri.
change version, add info to changelog, fix upgrade error with wrong sample data in 4.0.1
Merge branch 'v4.1' of github.com:ahilles107/Newscoop into v4.1
remove informations about pr's from chnagelog
Merge branch 'v4.1' of https://github.com/ahilles107/Newscoop into v4.1