Add variable voltage range to Plotter.
BugFix: Volt Regulator not sinking current from source.
BugFix: Probe values not rounding porperly
BugFix: Meter values not rounding porperly
BugFix: Missing include in SubCircuit
Added Voltage Regulator
Added 74HC00 and 74HC02 (Thanks to Mario)
Added Audio plugin ( Audio Out)
Added method to call in every simulation clock step (Replaces CircuitRunStage)
Added Led Color Property
