Fixed unused variable warning in GAudioOutput when speech is disabled.
Merge pull request #670 from Susurrus/speech_unused_var

Fixed unused variable warning in GAudioOutput when speech is disabled.
UAS threading improvements
Bumped config
Threading improvements
obey serial port intervals
Fix up threading of UAS object, WIP
threading fixes, still wip in some aspects
Threading fixes
Do not allow the PFD to turn QGC into a CPU hog
Fix warning / error due to comment on line
Unit test fixes
Merge branch 'master' of github.com:mavlink/qgroundcontrol
Temporary removal of UAS and TCPLink unit test

Recent threading changes have broken both of these. They will be fixed
in a separate pull request. Also added new CmdLineOptParser.cc/h
Simple command line option parser
Added --no-windows-assert-ui command line option

This disables Windows C Runtime assert dialogs from popping up.
Added --clear-settings command line option

Clears the persisted settings for the QGC
Fix constructor ordering warnings
Temp hack for Issue #647
UAS unit test back on