Have stratux record engine data

[tomcourt]

Record engine data by having the Engiuno pipe text to a port on the Stratux. The startup script on the stratux starts netcat (nc) in the background to record the text to a file. A script would rotate the file with one file per flight.

The Arduino would create another TCP or UDP port and would output a comma separated text stream of engine data to be logged. One line per second.