Toolbar/Instruments respect palette

Fix for espeak / alsa errors for #3015

Map control use different border color based on map type

Initialize espeak in async playback mode and explicitly synchronize after each synth operation in the worker thread.

Improve travis.yml readability

Also fix problem with log files over 4M causing build failure

Don't use channel 0 to avoid sequence number problems

APM PreArm message handling

adding follow me

Travis: Use Qt5.5 download for OSX

Add Solo video support

[WIP] Link thread safety enforcement

Make disconnect for prominent

This mechanism automatically queues data into the correct thread where necessary, otherwise the method is invoked directly with low overhead.

At the same time remove the UDP socket event workaround. It is not a problem.

Solo fixes

Also filter solo version string

Auto-Hide guided mode bar

Handle waiting for default component to come through in a better way

Also can handle additional components coming through after default
component is complete

Add SILabs serial ids for radio

Clean unused variables / Fix QObject macro

Add new QuadPlane flight modes

PX4 Tuning: Fix many bugs