Fix distance to next waypoint widget in QuickView.

This patch fixes a bug that display 0 for distances to waypoint more
than 10km.

Besides that, it also homogenize the naming of the label to
"distToWaypoint" instead of "distToWP". Old configuration files (in
home directory), should be hacked or removed in order to see this
change.

Signed-off-by: Paul Chavent <paul.chavent@onera.fr>

Flightgear HIL: remove disable-intro-music argument 

Reverting previous Installer commit

Figured out why command line builds were not working. To build Windows
release from command line you need msbuild …
/property:Configuration=Release

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