Update notes for submitted changes

* [RELEASE] Release of TYPO3 4.6.16
Update notes for submitted changes

* [TASK] Set TYPO3 version to 4.6.17-dev
Update notes for submitted changes

* [RELEASE] Release of TYPO3 4.7.8
Update notes for submitted changes

* [TASK] Set TYPO3 version to 4.7.9-dev