Initial commit of the LMU library and test application

  The test application is for controlling 2 motors using the L298N DC motor driver
  It is controlled with the help of a serial ModbusSlave library found at https://sites.google.com/site/jpmzometa/arduino-mbrt/arduino-modbus-slave.

Signed-off-by: Joshua Frkuska <j.frkuska@gmail.com>