Shibumi

Add Sploof 3 and Sparks 12 games.

Add Spook 13 and Spire 11 games.

Main feature is adding the Spaiji game (2). Also added a sandbox mode (8), and added a 6x6 version of Spargo / Margo (9). See the [milestone] for the full list.

[milestone]: https://github.com/donkirkby/shibumi-games/milestone/2?closed=1

Add the Spline game and Spargo game (4).

See the [milestone] for a complete list of changes.

[milestone]: https://github.com/donkirkby/shibumi-games/milestone/1?closed=1