pauls estimator: Added NaN guard before publishing
Added fields to range finder clarifying sensor properties
Added rangefinder message to MAVLink app
Untangled local pos and distance messages, now sending distance messages only for actual distance measuring devices
Merged master into mavlink_range_finder
Hotfix to PX4IO uploader. There are no known mishaps due to it, but very clearly the IO firmware flashing process should be verified after an upload.
Fixed blinkm state indication (was not properly reporting flight mode).  Added flashing orange safety disarmed state indicator and solid blue failsafe indicator. Changed safety on state to solid cyan.  Increased LiPo cellcount support to 6.
navigator: wrong mission topic was copied, clearer naming of offboard mission now
Merge pull request #838 from PX4/fix_mission_topic

fix mission topic bug, clearer naming
Merge pull request #829 from PX4/uploader_hotfix

Hotfix to PX4IO uploader. There are no known mishaps due to it, but very...
Merge pull request #835 from TickTock-/blinkm_fix

Blinkm fix
Merge pull request #820 from PX4/filter_nan_guard

pauls estimator: Added NaN guard before publishing
Merged master
Merge pull request #827 from PX4/mavlink_range_finder

Mavlink range finder
fw_config_fixes