Paparazzi 4.1.0_testing

First release candidate for next stable release.

- Total energy control
- PPM input on UART1 RX for Lisa/M autopilots
- Rate Limiter for Flaps, Gears and servo hatches
- GPS acceleration compensation in ahrs_float_dcm
- Improved gravity heuristic for int_cmpl_quat
- Some updates on digital_cam and photogrammetry modules
- Replace wget by OCaml Http_client from netclient lib to download files