Fall semester updates

[KarlPreisner]

Stepper motor code completed with accel and decel. Need to calibrate accel constant.
Got one linear actuator working on the arduino.
Got the servo gearbox working on the arduino and calibrated it.
Made a master-slave USB serial communication with the arduino and a Python program. The Python program will run on the Raspberry Pi. This will make the arduino a slave of the Raspberry Pi and ultimately the Raspberry Pi will be a slave of a user interface on a computer via ethernet cable.