Added Rev. 2

Rev. 2 - Control
-Removed the voltage and current usage calculation.
-Removed part of the motor's control via software serial.
>Now only the value '5' have an assigned task (emergency stop).
-Added a potentiometer to detect the motor's current angle of rotation.
-Added a second potentiometer with analog reading for control.
-Added a physical control feature.
>Now it can read the second potentiometer and set the motor position to
be the same.