Enhance "TYPO3 CMS" detection

For unknown versions or when the meta generator tag was removed.
Merge pull request #566 from lcherpit/master

[FIX] Adding an exclusion for "TYPO3 CMS" when "TYPO3 Flow" detected
Merge pull request #567 from lcherpit/typo3_fix

Enhance "TYPO3 CMS" detection