Added some more notes

Noticed when payload has no GPS fix, the old telemetry is still sent.
Need to correct this and follow the ukhas testing guide.
moved rtty code

Moved RTTY code to within the New GPS data routine.  Moved the
declarations for sats, alt, veloicity and bearing to global variables
within main loop.  Sats in No GPS now incorrectly listed as 255, not the
true value.
out with old in with new

removed old troubleshooting data and added new to do list for code
SATS value

moved the declarations to after the point that the GPS is called to
correct the wrong sats data being generated when there is no GPS fix