cmake always says OPENEXR_INC not found despite the fact that I have
the headers and it finds them correctly during building.
<digression>
There seems to be some conflict between setting, configuring as an
option, and autofinding files for some of the dependencies, and I don't
know how to resolve this.
</digression>
because it gets set to one value or another on most platforms.
On windows, only link to DirectX if WITH_OPENAL is set to ON
(it isn't needed otherwise). This OpenAL stuff is pretty confusing!
Temporarily disabled game engine for CMake
CMake for all platform, scons for Darwin, Linux, BSD3, SunOS5, Win32, and Makefiles should not compile game engine right now.
MSVC needs still disabling of game engine.