City Generator Options

I've added the debug tool I used to step through the city and building layout generator to the main menu of the game.  You can fiddle with the options to see how they change the layout of the city and then load the city to walk through.  To support larger cities the tiles of the map are hydrated in chunks.  Loading in chunks took longer than I thought it would do to legacy code from the pilot prototype cobblestone is based on.

The next feature will be *thin walls* which will require more removal of legacy code.  Those walls will also include the building interiors and support the pathfinding and collision detection.

For those interested in how the city is generated, it's based on this white paper but isn't followed exactly: https://ccl.northwestern.edu/2004/ProceduralCityMod.pdf

The building interior layout is based on this paper: https://graphics.tudelft.nl/~rafa/myPapers/bidarra.GAMEON10.pdf