Changes to allow msbuild to build installers

Failed QObject::Connect fix

ui->waitingLabel is deleted and set to NULL when mode is PX4. Must
check for NULL before using it.

The connect call was generating debug output to identify that it was
failing. After looking at the code realized that this connect is not
needed. The group box is removed when UASListWidget::removeUAS method
is called.

Second change in the file fixes a crashing bug when the last UAS is
removed. Need to exit the iterator after we modify it.

Issue 535 fix

Google earth: Corrected #ifdef for Google Earth-specific code.

Radio Calibration: Turning on/off advanced config show WIP plane view

3dviews

Disable text output from GAudioOutput.

All it does is clutter the terminal and it's not doing anything anyways.

No idea why, but manipulating CONFIG inside the build file confuses
msbuild command line builds. Work fine if you build from the IDE!

fix unused-but-set-variable warnings/errors in map3D

Turn off -Werror for Linux

Fix unused variables errors in Pixhawk build

Installers for Mac and Windows

The build process fixup PR to rule them all

Final Warnings fixed plus Warnings as Errors turned on

No need to stop mavlink no more

WP bugfixes