Store parameter xml size in .px4 file

This is needed in order to decompress in QGroundControl

navigator: Get rid of audio tag in strings and use appropriate priority to get audio out when needed in the GCS

Geofence max horizontal and vertical distance

timesync: Add uORB topic, general fixes

-changes GF_ON to GF_MODE
-adds GF_MAX_HOR_DIST and GF_MAX_VER_DIST params

Store the port so the in use port will be referenced when reopening.

fixed publication of mixer limit flags

Limit auto roll/pitch rates

simulator repository was renamed

sd card boot: Focus on card reliability, as wider adoption identifies corrupted card to be still a common problem

UBlox GNSS driver improvements

batt_smbus: add ioctl to return batt capacity

Also use full charge capacity instead of design capacity so that an old
battery's capacity will appear as lower than its original capacity but
it will still report 100% charged after charging

mavlink: Allow mavlink_send to take component_ID into account. Still use a default argument in case the user does not supply a component_ID

Remove ROS install scripts, they are now in PX4/containers

this also fixes the behaviour of the -C option

if we can't read the temperature registers 10 times then disable the
feature.

added "hmc5883 tempon" and "hmc5883 tempoff" to enable/disable