update master docs (first visible on github) to explain how to grab QGC2

Map fixes

Update Readme for MAC Clang compiler

Set home

Fixed RC calibration trim problem

Fixed RC calibration trim problem.  Trim was not being set because setTrimPositions() was never being called.

Remove duplicate file causing build errors

This reverts commit e003dd7a.

Fix autoscroll stopping in message view under high load

Anton and I noticed that the message view stops autoscrolling properly
sometimes when there's a high frequency of arriving messages. This
should fix that problem.

No longer automatically connect UDP on startup.

Include Path fixes

UASControlWidget: make modes list human-readable

Fix parameter formatting on save to file

Also fix a few compiler switch warnings