[agl] use ground_alt from autopilot if no SRTM data available
[agl] fix waypoint edit box display and sim ground detect
[srtm] improving information messages about SRTM data
[ground_alt] remove ground_alt from rotorcraft firmware

use directly state interface ref alt

ground_alt and state ref was getting out of sync when calling geo_init
only one time, making issues with nps when setting initial position far
from the flight plan ref
[ground_alt] add GetAltRef() to FW nav and update flight plans
[Lisa/S] Renamed Lisa/S V0.1 to V1.0.

The boards are software compatible, and as probably more people will
have the V1.0 it will decrease confusion. Those that have V0.1 will much
more likely know that they can use V1.0 board file anyways. :)
[Lisa/S] Fixed comments in the lisa_s board file.
[Lisa/S] Fixed the battery voltage calculation.
[Lisa/S] Added diagram of the motor names and directions.
[Actuators] Added the possibility to change base timer frequency.

In case of the Lisa/S we have MOSFETs connected to the servo outputs.
This makes it possible to drive brushed motors directy. The default
servo actuator driver is using a 1MHz input to drive the counter compare
timer. This limits the maximum (reasonable) timer period frequency to
1KHz. This frequency is well in the hearing range resulting in a very
unpleasant high pitched sound produced by the motors.

This change makes it possible to drive the basic STM32F1 timer with
maximum of 36MHz and advanced timer with 72MHz making the maximum
(reasonable) timer period 36kHz and 72kHz respectively. This puts the
noise produced by the motors way beyond hearing range and making the
craft flight much more pleasant. :)

Beyond that it shuold make the operation of the motors more efficient as
the induction of the coils should smoothen the signal out. But that
would need additional measurement to be confirmed/rejected.
[Lisa/S] Added example Lisa/S V1.0 on Ladybird airframe file.
Merge pull request #730 from esden/lisa_s

Lisa/S V1.0 support and an option to change the base tick clock of the servo pwm driver
[app_server] add flight_altitude setting index
[nav] don't set nav_pitch to 0 at each stage init

this especially prevent the pitch down effect during standard takeoff
when switching from climb to standby
[conf] change microjet_lisa_m example to aspirin_v2.2 with MS5611 baro
Merge pull request #714

For displaying AGL in GCS: use ground_alt from autopilot if no SRTM data available.

Please replace ground_alt with GetAltRef() in your fligh plans.

* nav_ref:
  [ground_alt] add GetAltRef() to FW nav and update flight plans
  [ground_alt] remove ground_alt from rotorcraft firmware
  [srtm] improving information messages about SRTM data
  [agl] fix waypoint edit box display and sim ground detect
  [agl] use ground_alt from autopilot if no SRTM data available
[stm32] fix spektrum on STM32F4

on F4 TIM6 is not running with AHB_CLK.
Also replace the custom DelayUs using TIM6 directly with sys_time_usleep.
[stm32] spektrum: TIM6 can only count up
[stm32] uart rx and config pin for spektrum can be separated

this is needed on Apogee boards
[stm32] radio_control spektrum polarity for apogee