HexHex Board Generator

This configurable OpenSCAD file generates hexhex boards (a hexagon of hexagons) with various style and functional options. Each space has a hole to contain a marble; I've sized the sample STL files for 16mm marbles that were cheap at a local dollar store.

The main options are:

* size in hexes
* size and spacing of holes
* optional hex grid lines (which can be adjusted to help use the board at varying sizes)
* optional guides for sliding marbles (which can be set to exit the board, similar to Abalone)

I don't recommend using the last two options at the same time.

There are hundreds of game that can be played on these boards with two to four colours of marbles. Some examples:

* [Yavalath and other games with the same components](https://www.boardgamegeek.com/boardgame/169738/yavalath-co) [(see also here)](https://www.boardgamegeek.com/geeklist/143644/games-you-can-play-yavalath-set)
* [Blooms](https://www.boardgamegeek.com/boardgame/249095/blooms)
* [Bug](https://ww