[RELEASE] Release of TYPO3 6.1.1

Change-Id: Ia228c35b857d29e44f6d4a07bdd1ed7d304dd4b2
Reviewed-on: https://review.typo3.org/21032
Reviewed-by: TYPO3 Release Team
Tested-by: TYPO3 Release Team
[TASK] Set TYPO3 version to 6.1.2-dev

Change-Id: If1a5084e5fbf12667e67fb16cf4f3e9752b58a35
Reviewed-on: https://review.typo3.org/21033
Reviewed-by: TYPO3 Release Team
Tested-by: TYPO3 Release Team