Specification for Nullable [Kit George]

I thought I'd make the Nullable specification available to everyone, for reference, and in order to allow you to ask any questions/issues. This is about to go through an ECMA review as well, so it should be interesting to see what their issues/comments are.

I've posted the specification on https://www.gotdotnet.com/team/clr/bcl/general/nullable2.doc. We'll continue to make more specifications available as we get closer to shipping!