[RELEASE] Release of TYPO3 4.5.25

Change-Id: I930eee365b05613162ca5d386d7e4c36511fb4b0
Reviewed-on: https://review.typo3.org/18771
Reviewed-by: TYPO3 Release Team
Tested-by: TYPO3 Release Team
[TASK] Set TYPO3 version to 4.5.26-dev

Change-Id: I884b7a09079e0aa45426e423e1ff91272c5d5802
Reviewed-on: https://review.typo3.org/18772
Reviewed-by: TYPO3 Release Team
Tested-by: TYPO3 Release Team