TIP telemetry decoder improvements

[thomasdouwes]

I want to add some improvements to the TIP telemetry decoder and I am opening this issue before I try to add them.

• Currently the TIP telemetry decoder outputs the "AVHRR Scan Motor Current" JSON array for all POES satellites, it's only "known" to be accurate for NOAA-15, I think this array should only be generated for NOAA-15.
• Apply the calibration from the METOP documentation, currently the raw output seems to be the source of quite a bit of confusion due to it's similarity to the mA value.
• Add TIP parity values to to the JSON output for use by processing scripts, it could just be an additional array like the timestamps EG. [1,1,1,1,0,1] for each value.