[rt_paparazzi] update 0.3.1.
aka big fat attempt to finally clean up the callbacks, threads, io and other stuff
1) Two sample configuration files:
* hexarotor Lia with GX3
* hexarotor Lia with Aspirin
2) Clean up in the rotorcraft_rt.makefile
3) Aspirin and MS5611 SPI drivers are now compatible with ChibiOS
4) Improved default chibios telemetry (more information)
5) Cleaned up drivers (ADC, SPI, I2C, UART)
6) Cleaned up board config files
7) Cleaned up error logging for uart (GPS/Telemetry threads)
8) Improved thread structure in main_chibios.c