navigator: RTL: set loiter wp instead of normal waypoint in RTL_STATE_DESCEND
navigator: RTL: set normal waypoint instead of takeoff waypoint in RTL_STATE_CLIMB
integrate range finder into fw landing
add missing $ in rcS script
Merge remote-tracking branch 'upstream/master' into fw_landing_rangefinder
set range finder to disabled as default
fw landing: do not use relative altitudes in TECS
fix comment for FW_LND_RFRALT
QU4D startup script
Update drv_hrt.c

TIM3 was not working properly with a custom application and I got it work changing TIM3 HRT_TIMER_POWER_BIT from RCC_APB2ENR_TIM3EN to RCC_APB1ENR_TIM3EN because on datasheet TIM3 is on APB1, I think that you should check also the others
Add filter parameters and multicopter defaults to parametrize Pauls estimator correctly when running for multicopters. Estimator itself not updated yet, will be next step.
Renamed FW filter to EKF to express its generic properties, switched multicopters over to this filter for first tests.
Added rc_map_failsafe to enable use of channels other than throttle for failsafe.
Decomission unmaintained position estimator
Updated filter to most recent version with accel scale estimation, exposed crucial parameters for cross-vehicle support
Merge branch 'master' of github.com:PX4/Firmware into ekf_params
Merge branch 'master' of github.com:PX4/Firmware into ekf_params
Added home position switch on GPS position - gives a more reliable home position setup
Changed home position set to depend on the commander home position switch
Proper zero init of the filter