Signed-off-by: Roman <bapstr@ethz.ch>

Signed-off-by: Roman <bapstr@ethz.ch>

control state airspeed

this will enable small planes flying without an
airspeed sensor

* the OSX builds were spending the majority of the time just updating homebrew and installing a couple packages

* move gcc 4.9 build to circleci

* travis-ci update to xcode 7.3

* travis-ci limit git fetching for OSX

* Makefile split firmware targets for CI

* OSX ccache

- priority field uses only the lower 8 bits, so we can merge with the
  update_reported flag
- orb_set_interval is not used often, so make the necessary data an
  optional pointer and alloc only when needed.

Memory savings:
- pixracer (w. ekf2): 7.3kB
- pixhawk: 5.3kB

This brings some makefile and script fixes, as well as an updated dspal.

in altitude control mode for fixed wings the roll setpoint was not
logged because the position controller publishes the attitude setpoint
but the desired roll setpoint is calculated in the attitude control
module. Now the position controller calculates the roll setpoint as well
for the sake of logging.

Signed-off-by: tumbili <roman@px4.io>

-limited to 16 chars

Unfortunately, lot's of whitespace changes, required to satisfy unspecified code style format errors.

Fixes shared memory locking bug and eliminates the need for an AppsProm driver to reserve a shared memory region.

Signed-off-by: tumbili <roman@px4.io>

Signed-off-by: tumbili <roman@px4.io>

If the failsafe state is ended when landed, we would switch back to
POSCTL and therefore take off again, however, all we want is stay on
ground and wait for the auto disarm.

The param COM_ARM_WO_GPS is set to 1 by default to allow arming without
GPS. This then sets a bool arm_without_gps which translates to
!GNSS_check in preflightCheck.

Previously, we renained in POSCTL and would drift away if GPS was lost.

The termination warnings were printed even if termination was not
actually enabled. This was confusing and is therefore fixed.

This reverts commit 9e704a5e121c7516e2133d02b328500d9d66fb67.