Spanner is released!

I have, this day, made Spanner available on Codeplex. It's an alpha release, which means I intend to make minor changes to the design and major improvements to the documentation, add tutorials, and all that. The ToDoMVC example is temporarily broken. Fixing that is first on my (real) to-do list -- as my old PhD supervisor used to say to me, beware of showing an idiot something half finished.