[TYPO3-mvc] FLOW3 Form API backport

[Bernhard Schmitt]

Hello everyone,

Good News!

The backport is progressing.

Bad News!

I ran into a wall. Two walls actually, called \TYPO3\FLOW3\Http\Response 
and \TYPO3\FLOW3\Mvc\ActionRequest. I couldn't find anything equivalent 
in the v4 API. So... a) did I miss anything, b) do we need a new Extbase 
version for this or c) will it be rather easy to (temporarily, until b)) 
backport these classes into the Flow3FormApi v4 extension?

Greetings,
Bernhard