First devlog (v0.0.3)

This is a simple Match-3 game, pretty much a copy of Puzzle Quest for now while I understand what I'm doing.

Major issues:
- Switching a tile towards the peripherical tiles sometimes do not work.
- Matching a 3x3 just sends everything to hell.
- No T-shaped matches
- You can use buttons when it's not your turn.
- Sometimes, the deadlock function sends a false negative. This prevents you from playing. Fun.

Minor issues:
- Window is not customizable
- Buttons can be clicked even when you don't have the mana.
- Only single player (or if you prefer: optimized for lonely gamers)

Yes, the assets are temporary. The tiles are not that bad, but I think they could be better. But Galen Weston Jr would not approve, I think. So far, the code is *manageable* and I've built it in a way that, I think, I can easily add more spells. But the priority really is to debug these freakin' major issues.