Used for unit testing

- debug builds always compile unit tests in
- seperate qgcunittest.pro is no longer needed
- found out the hard way that you can’t use debug or release as a
scope. You need to use the CONFIG(debug,debug|relase) macro (in this
example to test fro debug). Reason is that debug and release show up
multiple times in CONFIG, last debug wins. This is what the CONFIG
macro does. Without it, it’s luck as to what you get. I found OSX was
getting debug, Linux was getting a debug build, build into release
directories. QT_DEBUG set randomly. Lot’s of problems.

- NAN not available in windows headers, use cross platform friendly
version
- VS compiler does not allow initializing non-integral types in header
files
- ActiveQt libs are already installed by Win Qt4.8.5, no need to build.
Plus this part of the makefile just loops without nmake.exe installed
which is not part of a standard windows box

The remainder of .pro and .pri files have conditional inclusion of
OpenSceneGraph bases on availability. Removed this line which always
includes it and overrides the conditional include which is already in
other parts of the make files.

Build files were broken for unit test. Seems to difficult to try to kep
qgroundcontrol.pro and qgcunittest.pro in sync with each other. Instead
I made qgcunittest.pro just include qgroundcontrol.pro. This required
some tweaks to allow TARGET to be set from the outside as well as to
leave out main.cc. Also needed to modify qgroundcontrol.pri to use
TARGET instead of hardcoding app name. This way it can build either
qgroundcontrol.pp or qgcunittest.app. At this point only works on osx.

This allows you to add XY graph plots of any data.  For example,
x,y position data of a servo.

This fixes a bunch of bugs with setting the title for widgets, deleting
widgets, etc.  It also reduces the amount of code duplication, which is
always a good thing.

- DLL copying belongs in qgroundcontrol.pro, not qupdate.pro
- Turn on link time code generation for better (global) optimization

Instantiate a PX4 config view in PX4 mode from start, since boards with just the bootloader (or no working telemetry) cannot be flashed else.

This reverts commit 09452414.