Empty Road; Algorithm changes; Debug info

Lots of bugs fixed.

Algorithm is currently borked but it should be much more productive tuning it these days.

Fixes:

All tiles correctly rotate counter-clockwise
All tile descriptions match the new cardinal directions (Up-right is north, Up-left is west)
Tile co-ordinates (from Tiler lib) are now displayed atop the pieces

gregziegan / peoples-budget-viz