[flight_plans] fix cube.xml
[boards] lisa_l: fix typo in PWM_SERVO_6
fix on nav_check_wp_time
[app_server] support tcp stream and don't read conf.xml directly
[ins] prevent drifting of the ins_invariant while waiting first gps data
[nav][gls] initialized target airspeed even if airspeed control is not used
[ardrone2] update script to configure the ardrone2

- network configuration script
- add autoboot install command
- add HOST variable to ardrone2 script's parameter
- fix typo for checking if vision is running
[stm32] actuators_pwm: fix for LisaL

Thanks to tommy.detoisien for finding this fix.
Merge pull request #755 from kadir4172/fix_on_check_wp_time

fix on nav_check_wp_time
[stm32] actuators_pwm: remove unused defines
[stm32] add support of pwm_input for stm32

- two pwm input can be configured
- only TIM 1, 2 and 3 are implemented
- example in apogee board file
[rotorcraft] guidance_v: limit z_ref in update_ref_from_zd_sp

Limit the gv_z_ref to GUIDANCE_V_REF_MAX_Z_DIFF (default 2m) from current z position.
This should be useful if the aircraft can't follow the alitude in climb mode (e.g. when limited by max throttle).