[TASK] Fix TYPO3 6.1+ compat, remove dependencies to EXT:fed

I made all the fixes for TYPO3 6.1+ and completely removed the dependencies to EXT:fed
Where I could find a fitting ViewHelper in current EXT:vhs, I used that one, where I couldn't, I copied the ViewHelper to EXT:notify. Furthermore I copied needed services from EXT:fed to EXT:notify.
Both support arrays and strings, I set them both to mixed.