Contract Light

*Added a plugin!
*Added ability to add new ProgressNodes to the Progress Tracking tree
*Added probe altitude record progress node and contract (sounding rockets). Goes all the way up to the SoI edge.
*Batteries available earlier
*SPU + antenna in 0.3m sounding rocket core
*Added RT base antenna to start node
*Add 3.05m size for proc fairings in Basic Rocketry node
*Disable all part test contracts
*(DEBUG) show part info in expanded tooltip
*Lower sepmotor cost to $7000