(Except for handling of longs in TypeInfo and win32-only Maya import stuff).
sizeof(long) == sizeof(int) on x86 and win64,
but not on 64bit (x86_64) linux/unix/osx/.. so they should be avoided.
Don't include the lazy precompiled.h everywhere, only what's
required for the compilation unit.
platform.h needs to be included instead to provide all essential
defines and types.
All includes use the relative path to the neo or the game
specific root.
Move all idlib related includes from idlib/Lib.h to precompiled.h.
precompiled.h still exists for the MFC stuff in tools/.
Add some missing header guards.
