[TASK] Release version 0.6.1

Resolves: #61713
Releases: 0.6
Change-Id: I9d9f974c17231781ac605716450a73eb02a338e9
Reviewed-on: http://review.typo3.org/32864
Reviewed-by: Francois Suter <francois@typo3.org>
Tested-by: Francois Suter <francois@typo3.org>