Can you also record the performance created with cells?
You can’t record your actions afaik, but if you mean the audio, then you could put a recorder plugin on the master out.
edit:
maybe in combination with the auto-clone tool ( http://www.renoise.com/tools/auto-clone-patterns ), you can at least record in the note-events from your loops in the pattern editor?? Not sure though, you have to try it.
No, not at the moment. It is a planned future feature though.
Note that Cells 0.9 is discontinued as Cells! 2.0 is in beta.