Fix startup object

Solved issue officinerobotiche/simple_unav_console#1 and officinerobotiche/uNav_PID_Tuner#15

New motion messages

The library now is updated with new message to control motor.
Fixed problem to use with OS windows.

First stable release

This code was born from https://github.com/officinerobotiche/ros_serial_bridge
This branch is useful to communicate with board:

• uNAV
• RoboController
• Motion Control
• Navigation Board