[conf] udev rules: add dfu devices to plugdev group
[ahrs] remove old ekf/lkf algos
[conf] error instead of warning on stabilization euler
[sim] add launch and noground options to pprzsim-launch
[paparazzi center] improve backup message
[pprz_center] Added Get Help dialogue to Help menu
[math] remove ALGEBRA_x_USE_SLOW_FUNCTIONS
[math] untabify
[ardrone] Barometer bmp180 implementation added. Also fixed a bug in the navdata driver, where cropping was done twice. Baro still needs to be tested, because sometimes unexpected things happen.
CDW: Fixed Baro
[modules] Rebuilt modules for ardrone firmware 2.4.3
Merge branch 'ardrone' of github.com:dewagter/paparazzi into dewagter-ardrone

Conflicts:
	conf/airframes/ardrone2_raw.xml
	sw/airborne/boards/ardrone/baro_board.c
	sw/airborne/boards/ardrone/baro_board.h
	sw/airborne/boards/ardrone/navdata.c
	sw/airborne/boards/ardrone/navdata.h
Merge branch 'modules'