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/ParallelPrimitives/kernels/PrefixScanKernelsCL.h

@@ -154,5 +154,4 @@ static const char* prefixScanKernelsCL= \
 "		dst[cb.m_numBlocks] = sum;\n"
 "	}\n"
 "}\n"
-"\n"
 ;