Update comment after bug is closed

The documented solution is to do what the script already did. So no code
changes are needed.
Use normal detection logic for 2 NVIDIA cards

Until now in all cases where more than 1 card was detected the
xorg-driver was used. As the proprietary NVIDIA driver now supports 2
NVIDIA cards (at least in a MacBookPro5,3) we use the normal detection
logic in this case.
Merge branch 'xorg-driver-selection' into lernstick
Update changelog

Increase version to lernstick10 because lernstick9 was released but
never commited. Version lernstick8 was the same as lernstick9, but never
released.