Base url (i.e., url of directory) from which to load tile images.

Format this state, assumed to be a keyword indicating a state in the world, into a CSS class

Render this state, assumed to be a keyword indicating a state in the world, into a path which should recover the corresponding image file.

TODO: write docs

Render this world cell as a Hiccup table cell.

Render this world row as a Hiccup table row.

Render this world as a Hiccup table.