Julia version using BLAS gemm

This runs in 1.8 seconds on a Xeon E5410 running RHEL5

Compare to a roughly 4x slower version that does not use BLAS here
https://gist.github.com/anonymous/c7501c8bbf4ac7ba8a20
don't need to download, data is in same repository
Merge pull request #3 from tavert/patch-1

Julia version using BLAS gemm