Add project files & prebuilt binary

All you need to do is run bin/zoomy.exe.  You need to have at least
DirectX 9.0c installed to run this app.  I included the D3DX9_43.dll
file because there are a lot of different D3DX versions and it's
common that someone doesn't have the right one.

Controls and description are at the top of zoomy/zoomy.cpp