cl4d OpenCL wrapper moved to Github

[Trass3r]

> The vectorAdd example works perfectly, without any editing (ie. without  
> removing the mixin(CL_PROGRAM_STRING_DEBUG_INFO)).

How strange, does pragma(msg, CL_PROGRAM_STRING_DEBUG_INFO); give  
different results for the two dmd revisions?

> The CLGLInterop example however still just gives a black window. It only  
> outputs the FPS in cmdline.

any error messages?
compile it in debug mode with -debug -g.