[rotorcraft] only go to HOME mode if in NAV

then you don't have this "failsafe" in manual modes anymore,
but it will prevent issues like #850
[airframes] fix quad_navgo actuators for nps
add HBMini - Board files
Add confs for HBMini
[simulator] fix flightgear viz on 32bit systems

all current fg versions have that padding1 var, hence also no need for pack pragmas
[build] remove 'load' target from makefile

It is a special command in Make 4.0
update create_module helper
code style formaters

fix_code_style.sh script uses astyle which works very well.
Eclipse is not very good at this, but better than nothing...
[flight_plan] set primitive should not delay next stage

when a set is called, it should not stop the navigation for 1/4 second.
[flight_plan] fix return primitive
[release] v5.2.1 stable version
[ocaml] filter for 'field' tag when looking at messages
[python] fix settings path
[messages] update dtd to allow descriptions

backport only dtd changes from #987
[ext] update chibios repo

since https://github.com/ChibiOS/ChibiOS-RT.git was deleted
[conf] Lodewijk
[select_conf] Now also selects control_panel
[conf] Bart
[conf] altura
[start.py] Select when launching, start.py alias