Added getters and setters for speed, power, time, step
Added getters and setters for ramp_UP, ramp_down, and steer
Got calculate_speed working, speed parameter can be read to get current motor speed. Still more cleanup needed. Next step is to get regulate_speed working
Speed regulation now works, instead of power, set target_speed. Next step is ramp up and ramp down to exact position
Merge remote-tracking branch 'motors/motor-driver'