[peripherals] ms5611: check temp and pressure range

Discard measurement if it is not in valid range...
Based on proposal by Kevin, thanks!
[ardrone2] add generic upload/download functions

- make it easier to get or push files to the ardrone
- change upload_paparazzi function to a more generic name
Merge pull request #758 from paparazzi/ms5611_bounds

[peripherals] ms5611: check temp and pressure range
[stm32] i2c: fix reset

should be RST_I2Cx instead of RCC_I2Cx
was wrong in libopencm3 docs
[pwm_meas] use enum for pwm_in channel number
[module] add a new meteo module to get data from Meteo France PTU board
[modules] use VPATH to make it easier to load external modules
Troep
Merge branch 'master' of https://github.com/dewagter/paparazzi