Introduce SYS_RESTART_TYPE parameter having one of 3 values: boot
restart, inflight restart, or unknown restart, and defaulting to unknown
restart.

px4io.cpp sets this parameter according to the type of restart detected.

dataman.c retrieves this parameter and clears data entries according to
their persistence level. Does nothing if unknown restart.

mpc_local_pos + rc_timeout

Renamed parameters which changed from RAD to DEGREES to avoid user confusion. Also made naming of the two parameters more consistent.

Arm/Disarm duplication removal and support for Disarm in VEHICLE_CMD_COMPONENT_ARM_DISARM

Mag declination hotfix

Compile pedantic

warnings: don't spam with warning for missing field initializer

sensors: Keep looping in sensors app even if gyros do not update any mor...

launchdetector: fix copyright header

Sensor error handling

Indoor gps simulation mode

add tags file to .gitignore

Conflicts:
	src/modules/mavlink/mavlink_receiver.cpp

mavlink: Start the same in HIL mode as in normal mode. Requires all HIL ...

Revert "HIL: Increased MAVLink link wait time based on previous experience that this is timing sensitive."

This reverts commit 78bf7ed9.

Reduce data manager SD card wear and tear