[TASK] Release Version 1.2.3

Change-Id: Ideae1defdbec5ebe2e29d8206f6ea6de5dbfa7ee
Reviewed-on: http://review.typo3.org/32460
Reviewed-by: Tim Lochmüller <tim@fruit-lab.de>
Tested-by: Tim Lochmüller <tim@fruit-lab.de>