Handle the standard windows-3rd-party setup (used by fgmeta) with no
extra options, and also handle the slightly odd setup we use on Jenkins.
Try to tolerate all permutations of setting MSVC_3RDPARTY_ROOT to
different places in the hierarchy.
We no longer try to guess Boost_INCLUDEDIR by looking at parent dirs of
MSVC_3RDPARTY_ROOT, since this seemed kind of bad to me. Let’s try
it and see.
Refactor to break circular references.
New custom target generates the resource files.
FGFS and Test_Suite targets declare a dependency to the generated files.
This is for simplifying the main src/Main/CMakeLists.txt file and allowing the
code to be shared with the test suite.
The generated source and header files have also been removed from the main
source list and placed in the CMake module as the global variables
EMBEDDED_RESOURCE_SOURCES and EMBEDDED_RESOURCE_HEADERS.
