Straight from the diff of their released source vs vanilla SDK 1.3.1
Completely untested so far.
Thanks to the Doom3: Lost Mission team for releasing the source and
allowing me to relicense their changes under the GPL!
(see https://github.com/dhewm/dhewm3/issues/265)
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.
