MSTSDieselLocomotive - basic engine physics added (Power is based on EngineRPM, what is computed from Variable2)
MSTSElectricLocomotive - added pantograph logic and power-on delay. The throttle does not take effect if power is down. Voltage display got a smoother behavior.
Some Info-display loco-specific information added (to be cleaned up).
git-svn-id: http://svn.uktrainsim.com/svn/openrails/trunk@830 a9f3cfff-6c41-7446-b0ca-052bd761e6eb