Another fight with invisible wall

I hope this "invisible wall" bug is finally over...

Added S-class variant with drone. It's the last new content update.
Hopefully fixed invisible wall bug.

Small fixes due to 1.0 update

Reactor battery now function as power buffer.

View below

Fixed bugged sprite near reactor. Fixed reactor shutdown command not working. Added armour platings on A-class (at tail and prow) and reduced the price back. Reduced engine power consumption in A-class. A-class turret lights are much brighter now. Changed name of backup power supply to "Additional power supply" to avoid confusion, because battery is not able to output enough power to independently run the ship without reactor working