[paparazzi.py] Produces .md with branch description
[airframes] replace joystick subsystem by USE_JOYSTICK
[modules] dc: use state interface for utm position
[gps] refactor sendng of SVINFO
[modules] flight_benchmark: move settings into module xml file
[settings] remove some obsolete files
[modules] flight_time: move settings into module xml file
source and xml files should not be executable

closes #898
remove trailing whitespaces
[simulator] use unconnected socket for FlightGear viz

So you can start FlightGear after the sim and not get Connection refused (send()) errors.
Should solve #915
[rotorcraft] navigation: use NAV_FREQ to update stage and block time
[maps] hopefully finally fix google maps version download

seems like #865 didn't work with sed version on OSX after all...
So just use gnu sed on osx and the documented gnu sed -r option instead of -E

Also add a check if the extraced google version is actually a valid integer number..
[modules] dc: Some correction in description text
[rotorcraft] get rid of some warnings in ardrone2_sdk
[gen_fligtplan] 'call' statement can be configured to loop and/or break

default behavior:
- the function is called until returning FALSE (same as before)
- at the end of the call, go to next stage immediately (new)

this is related to #830
more bug fix
Merge remote-tracking branch 'paparazzi/master' into datalink_functions

Conflicts:
	sw/airborne/subsystems/gps.c