* MavLink/master:
  android remote duplicate screen support
  Double-check link status after signal comes through
  Warning on running out of mavlink channels
  Mini-protocols must only communicate over single link
  Add priorityLink and sendMessageOnLink
  Keep track of USB direct connection links
  Remove change which is in another pull
  Mini-protocols must only communicate over single link
  Add priorityLink and sendMessageOnLink
  Keep track of USB direct connection links

This reverts commit 02f69bea.

Mini-protocol must only send on one link, in some case entire transaction must stay on same link

Mission changes

Previous order was signalling new mission items available prior to in
progress going false. This was causing MissionController to pull an
empty mission list.

Prevent loss of mission due to load or close app

Fix RadioFlash

Be specific about direct usb connection

Prevent map from stealing ListView scrolls

Verify was failing due to incorrect READ_MULTI max size

qmake only copy linux libs for installer

Modernize

Android limit to tablets for now

Onboard Files is PX4 only

RCToParam is PX4 stack specific

- fixes #2551

Prioritize real joystick over virtual joystick.

R.Pi2 Support

GPS Indicator fixes.