v0.2 Release

The addition of railroads and a new style of desert / sandy terrain are the highlights of this release. I wasn't planning on including railroads just yet, but I started working on them and, well, here they are.

Additionally, new T-junctions and sandy river tiles expand options with water quite a bit. Large beaches are made possible by using sandy water tiles with the sand transition tiles.

For decoration, pyramids and cacti are included in the desert-alt file, and there is one new house with a hedge in the building file.

For the next release, I'd like to focus on buildings exclusively. There needs to be a lot more variety there, but I'm definitely happy the basic infrastructure tiles are in place.