Quick and dirty fix for the recent bugs

Should fix the duplicating ships, dissapearing space center, missing or misplaced RT connection lines in the map view and various other weird issues.
Removes per-frame caching of VesselSatellite.SignalProcessor

This seems to fix the recent issues, although I'm not yet sure why.
Merge pull request #1 from madadam/quick-and-dirty-fix

Quick and dirty fix