Added release year to albums

Fix for issue #46.  Since taglib-sharp is only going to give us an integer Year, rather than string Date, using UNIX timestamp would be somewhat of a moot point, as it's just a larger integer.

- Added an INTEGER column "album_release_year" to table album.
- Added releaseYear to InsertAlbum
- Added default null releaseYear to AlbumForName, because the only time this should be called with three parameters is when first creating an album.
- Added wavebox.sql, to show raw schema.