added (and stripped) a simple C/C++ preprocessor (written in Lua), so the stringifier can handle the #include directive,

and embed the included files directly in the stringified files.
We need this, because we start sharing struct definitions and code between C/C++ and OpenCL (and potentially other languages)
preprocessor is from http://github.com/willsteel/lcpp

src/Bullet3OpenCL/NarrowphaseCollision/b3GjkPairDetector.h

@@ -9,7 +9,7 @@
 #include "Bullet3Common/b3Vector3.h"
 #include "Bullet3Common/b3AlignedObjectArray.h"
 
-struct b3Transform;
+class b3Transform;
 struct b3GjkEpaSolver2;
 class b3VoronoiSimplexSolver;
 struct b3ConvexPolyhedronCL;