Bento talk for PyCon2011 submitted, and some bento updates

I have just submitted a talk proposal for bento at pycon 2011. If accepted, the talk will be a good deadline to get a first alpha ready.

In the meantime, I have added windows support, and I can now build numpy on windows 64 bits with the MKL library. There are still a few rough edges, but I think bento will soon be on par with numscons as far as supported platforms go.