[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