create premake4 solutions for the various OpenCL configurations (AMD, NVIDIA, Intel OpenCL SDKs for Windows)

primarily to distribute project files that work.
CMake is still better supported in general (not all demos/libs have been ported)

Revert a recent change about warnings: %zu doesn't work in printf, %d does

Demos/premake4.lua

@@ -18,7 +18,7 @@ function createDemos( demos, incdirs, linknames)
 	 		files   { "../msvc/bullet.rc" }
 	
 		configuration {"MaxOSX"}
-			print "hello"
+			--print "hello"
 	 		linkoptions { "-framework Carbon -framework OpenGL -framework AGL -framework Glut" } 
 		
 		configuration {"not Windows", "not MacOSX"}