[RELEASE] 3.1.0

Change-Id: I8ceaa35496bc21708ddd1dc1a415f1b0bc831244
Releases: 3.1.0
Resolves: #61707
Reviewed-on: http://review.typo3.org/32860
Reviewed-by: Fabien Udriot <fabien.udriot@ecodev.ch>
Tested-by: Fabien Udriot <fabien.udriot@ecodev.ch>