[vsipl++] [patch] SSE on amd64, other config hax

[Jules Bergmann]

Nathan (Jasper) Myers wrote:
> Patch below makes FFTW3 use SSE/SSE2 on x86-64, and cleans up some
> config file and minor build details.  OK?
> 

Looks good, please check it in.  Do the x86-64 changes work on Sethra? 
-- Jules