TYPO3 Core

Problem:
Currently we're using prototype 1.5.0 and scriptacolous 1.7.0. Since a few days a preview of the upcoming scriptacolous library (1.8 preview 1) is available, this one also uses a very recent prototype (1.6 rc0) trunk snapshot.

In many cases it would be very comfortable to be able to already use features of prototype 1.5.1.1. The problem is that we can't just upgrade prototype to 1.5.1.1 alone as scriptacolous 1.7.0 doesn't work with that version. (Something seems to be really broken or at least strange with their release management considering backwards compatibility ;-)

I also know that the Tobias Liebig who's working on the TS editor would like to use prototype 1.6.

Solution:
update both libraries to the mentioned preview releases.

Notes:
As we're in alpha phase ourselves I don't mind updating to a preview release of the libraries as we can do this only now. We definitely can't update to sciptacolous 1.8 and prototype 1.6 with a TYPO3 patch level release and maybe not even after feature freeze - but that's debatable.

Nevertheless IMO we can update to the final releases of the libraries with a TYPO3 patch level release (f.e. 4.2.1) if they release their final versions after TYPO3 4.2 has been released as I then would consider it a bug fix.

Doing the update now also gives us and the community enough time to test them and find bugs that might occur relating to the update.

I'm already testing the preview releases and didn't find any bugs yet. I also asked Olly to test the new versions as - to my knowledge, correct me if I'm wrong - he's the only one using scriptacolous effects in the core.
(issue imported from #M6526)