updated project settings (optional)
Prevented exception-spam relating to RealFuels

"pressurizedFuels" was being used despite not ever being instantiated.
Added some debug messages.
Referencing ModulesFuelTanks directly.
Adding a threshold instead of equivalence

"engine.requestedThrust == 0.0f" may or may not work depending on the
0.0f chosen (unless there is something I don't know about C#)