[math] add SV decomposition and make proper functions
[fix] set lower number of decimal to log (was exceeding  buffer size)
[math] fix compilation with g++ (for nps)

this solution is not really nice and consume a bit more space, if
anyone have a better idea...
[fix] node name for modules' datalink event
[math] add some more dox
[conf] some joystick cleanup

- RC_4CH message does not have a joystick_id field
- there is no rc_dl_active_joystick anymore
- aurora_skate_controller is out-of-date/non-functional
[ground_segment] input2ivy: improve error messages
[sys_time] fix get_sys_time_usec with chibios
[extra_dl] make extra pprz telemetry work even if transparent telemetry is not used
[sdlog] SDLOG transport for logging directly using telemetry macros

compatible with sd2log tool to extract data
[meteo] add Meteo France DAQ board driver

get data from DAQ board and log on SD
send report to the ground for real-time monitoring
[Makefile] add pcre lib to jsbsim, cleanup shell commands
[logalizer] fix missing tab in makefile
[jsbsim] ahrg, fix LDFLAGS