Auto-Disconnect on cable pull

Add GStreamer to OS X travis builds

Fix opening QML based settings is twitchy and unreliable 

[WIP] add PX4 airspeed mode

Show GPS error message only on map view

Validate/Set decimal places against increment value

Plumb ublox RTK device ids through QGCSerialPortInfo

Plan: Remove All sets dirty bit

Better feedback for command failures

Fix opening QML based settings is twitchy and unreliable on Windows touch (Surface Pro-like) devices

Plan: Scroll list to current item

Minor things

Skip "non compliant" Qt libraries (for Mac OS App Store)

Fix GStreamer relocation for Mac OS release (installer) builds.

* appveyor install nsis from s3

* Pass YAML linting, pls work

* Simpler nsis download scheme

Fix RTL_LAND_DELAY usage

Fix noisy output

Better messaging for no airframe set

WiFi sensor cal