Electric System, Engine and Parking Brake improvements

[5298125985218]

Electric System:

• The old update() method relied only on switches positions. Now the switches and system status are used to define the bus voltages, contact connections, relays, and more.
• EICAS will now show the voltage of the emergency bus.
• Batteries drain out or are recharged.
• Avionics Master switch has been set to ON at all births.

Engine:

• Engine starting/shutting down will now take into consideration the switches positions, whether the starter is on, the ignition status, the power supply and the engine rpm.
• It's now possible to execute dry startups, startups with PMU in manual and automatic reignition.
• The engine can now start with main pumps in off (mechanical pump mode).
• Using the starter now heavily drains the battery if no external power is supplied. This should be enough for one startup in flight, or one in the ground.
• Added the ENG MAN alarm.

Brakes:

• The brake light color is now green.
• The parking brake will now turn on only if there is enough pressure in the emergency brake accumulator.
• The accumulator will recharge when the compressor is running.
• Added the EMER BRK alarm.

Flaps:

• Now they default to DN when birth=GROUND_HOT (You take off with flaps in DN).