Request Script to Unroll sensor_gyro_fifo and sensor_accel_fifo

[AlexKlimaj]

The sensor_gyro_fifo and sensor_accel_fifo messages in PX4 are hard to analyze due to the combined nature of the message. Each message can contain up to 32 datapoints with a dt and scale.

I propose we create a script to take a log, unroll the fifo messages, and save a new log file with the additional unrolled messages.

It appears this is not possible in PlotJuggler with just LUA scripting.

@dagar