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

 (originally removed in 436d0f78)

Conflicts:
	QGCExternalLibs.pri

Add new waypoints based on the UAV airframe type

Reverted windows build change from ThirdPartyWarnings merge

Third party warnings

Merge branch 'ThirdPartyWarnings' of https://github.com/DonLakeFlyer/qgroundcontrol into ThirdPartyWarnings

Not going to fix these two warnings in Windows builds so silence from
makefile

Use a pragma around our use of that header to silence the warning. OSG
3.01 has these warnings, 3.2 has fixed them, but 3.2 doesn’t isn’t the
widely used release yet. So at some point when we upgrade to 3.2 this
will no longer be needed.

qserialport and qextserialport use the pattern of += into
PUBLIC_HEADERS and PRIVATE_HEADERS. This leads to the same header being
included twice. Which in turn causes the rule for moc in the makefile
to be added twice, hence the warning. Using *= instead of += removes
the duplication.

The latest version of qwt does have these warnings fixed. But the
latest version also has removed some deprecated printing functionality
which we are currently using. I gave a try at updating but it looked
fairly involved and over my level of understanding for that part of the
code. So pragmas for now. When someone does upgrade qwt the pragmas
will no longer be needed.

I looked at the latest version of opmapcontrol in OpenPilot. This has
not yet been fixed. So added pragma to silence.

Either this location is incorrect, or it is an optional install that I
haven’t figured out how to get yet. Either way, this is failing
TeamCity Windows Releases builds which I want to turn on. So for now,
I’m disabling. I’ll figure out how to make it work correctly with my
work on generating windows installs.