Fix header row in CSV file

[lockedmouse]

As of the current release, there is no more line break between the header and the actual data in the csv file, aka it looks like this:

millis,pressure,avg_pressure,arousal,motor_speed,sensitivity_threshold,clench_pressure_threshold,clench_duration15,0,0,0,300,2755,0,1
68,0,0,0,300,2755,0,1

when it should look like this:

millis,pressure,avg_pressure,arousal,motor_speed,sensitivity_threshold,clench_pressure_threshold,clench_duration
15,0,0,0,300,2755,0,1
68,0,0,0,300,2755,0,1

This definitely worked in v0.6.4, so it must be a regression introduced by one of the later patches.

No idea if my commit is the correct solution, feel free to fix it some other way if needed.

[lockedmouse]

Also, it looks like the header row is outdated: The pressure field is no longer written, and instead there is a new orgasm_count field at the end.

Any specific reason why pressure is no longer written to the CSV file?

Also, the avg_pressure field is always written as 0, when it was working in the past. So I think the logging is broken.

Edit: I see this was already reported in #95. My PR fixes the header row but none of the other bugs.