pauls estimator: Added NaN guard before publishing
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.
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
Merge branch 'master' of github.com:PX4/Firmware into ekf_params