last_checksum_wrong is always FALSE. And probably a bad idea anyway.
[modules] nav_survey_poly_osam: sweep improvements

Added half U-turn even if not sweepback
Some modification to change sweep distance and number of points using telemetry parametrers
option to use default 1/2 sweep distance for start line or using alternative 1/32 sweep start

Its is very useful when using poligon survey osam for photogrametry

closes #938
[conf] update settings_modules in confs
[modules] fix poly osam

variable initialzation only in own block
[modules] digital_cam also for jsbsim
[modules] nav_survey_poly_osam: protect dc stuff
[style] fix code style
[ardrone2] merge the 2 fix for frozon mag

- keep the imu_lost counter
- sending state is only asynch
[ardrone2] wait using a for loop of usleep, not only one
[server] log LINK_REPORT message (#1031)
[ext] .gitingore for blackmagic bin

closes #1034
[boards][stm32f4] Lisa MX luftboot support

Added support for luftboot-like bootloader for Lisa MX 2.0 and 2.1
(the bootloader itself is in ext repository, this is only support in pprzi code)
superbitrf session working
clear from hand flightplan builds no test flight yet
first testflight with new flightplan success except wp stby sometimes to low so set groundref here in takeoff need tesing

Conflicts:

	conf/airframes/BR/conf.xml
good flight only standby under ground can exist
[messages] MKK sign-error
[conf] altura

Conflicts:

	conf/airframes/LS/conf.xml
[conf] altura calibrated + gps
[conf] default flash mode