Merge pull request #10 from Gooseheaded/master

pull Master -> darkeBranch
Refactored some Hex stuff including layer computation.
More work on the tileset, first tiles to be exported soon.
Exported Dirt Tiles. Cliffs are work in progress, but mostly completed. Once those are exported, we will be able to start making good-looking maps with altitude.
Merge pull request #11 from Gooseheaded/darkeBranch

Darke branch