Ported sparse matrix multiplcation (Chapter 22) spmv to Windows

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Hi,
I'm studying OpenCl and made Sparse matrix multiplcation spmv run
under Windows 32/64bis OS; tested with bcsstk35.mtx and consph.mtx.

All the changes are ifdefed for _Win32. Also fixed one bug in matrix_gen.cpp 
for .mtx parsing.

I hate to throw this port away... do you want it?

Regards,
Sergei.

Original issue reported on code.google.com by [email protected] on 3 Nov 2011 at 6:45