Added a VS project

Sorry GitHub, it only LOOKS like I deleted things.

It turns out Monogame is looking pretty good; I think by the time MS
figures out how to permanently kill XNA, I will be able to painlessly
port the results.  Plus, I don't really think this game will fit in a
browser, and coding in JS is making me frustrat[ing|ed].  So.

Going to work from the Isometric Tile Engine I made before.  Yay for
code reuse!  I will also be cannabalizing Operation Cow Mouse heavily
(which is effectively dead due to a lack of goals).

None of that is in there now, though, and in fact this is currently just
the demo project from the engine, with some content removed.