[TASK] Bump the version number to 0.7.79.

Change-Id: Ic3877a470a7515525a70091597ecae44b436112d
Reviewed-on: http://review.typo3.org/32531
Reviewed-by: Oliver Klee <typo3-coding@oliverklee.de>
Tested-by: Oliver Klee <typo3-coding@oliverklee.de>