change lcpp Lua preprocessor, to keep #defines and comments, remove empty lines

remove duplicate data in b3Contact4 (now in btContact4Data shared between CPU/C++ and OpenCL)
OpenCL kernels use #include "Bullet3Collision/NarrowPhaseCollision/shared/b3Contact4Data.h"
Increase number of batches back to 250 (from 50), need to fix this hard coded number (see https://github.com/erwincoumans/bullet3/issues/12)
Work towards GJK/EPA, in addition to SAT/clipping (early on)

test/OpenCL/KernelLaunch/premake4.lua

@@ -0,0 +1,33 @@
+function createProject(vendor)
+	
+	hasCL = findOpenCL(vendor)
+	
+	if (hasCL) then
+
+		project ("Test_OpenCL_kernel_launch_" .. vendor)
+
+		initOpenCL(vendor)
+	
+		language "C++"
+				
+		
+		kind "ConsoleApp"
+		targetdir "../../../bin"
+
+		includedirs {"../../../src"}
+		
+		files {
+			"main.cpp",
+			"../../../src/Bullet3OpenCL/Initialize/b3OpenCLUtils.cpp",
+			"../../../src/Bullet3Common/b3AlignedAllocator.cpp",
+			"../../../src/Bullet3OpenCL/Initialize/b3OpenCLUtils.h",
+			"../../../src/Bullet3Common/b3Logging.cpp",
+		}
+		
+	end
+end
+createProject("clew")	
+createProject("Apple")
+createProject("AMD")
+createProject("Intel")
+createProject("NVIDIA")