Use the gps to set the rtc
use the rtc to track when we saw something in case the gps isn't
available
currently not tracking devices before we ever have a valid time
update gps more often especially when we need it
update wigle csv from 1.4 to 1.6
limit sd card hits to once per second
pass way fewer values to logToCSV
Automatically create new filenames instead of overwriting

because the rtc is...an rtc, we can read from it without setting it
first.  it might be a little off, or completely wrong if it's never been
set, but usually it's somewhat realistic.

also remove a debug line