szlachcic/leo_firmware_relay forked from LeoRover/leo_firmware

Summary
-add relay handler

You can now control 4 relays connected to Husarion's hSense1 port via ROS messages.

New topics:
-/relay1 (std_msgs/Bool)
-/relay2 (std_msgs/Bool)
-/relay3 (std_msgs/Bool)
-/relay4 (std_msgs/Bool)