Precompute number of land cells and water cells within r manhattan distance of each cell
Precompute path distance from all cells on the board to each player's home
cell.  Fix bug in getNearbyLocs
Merge branch 'preprocessing' into board-class-updates

* preprocessing:
  Precompute path distance from all cells on the board to each player's home cell.  Fix bug in getNearbyLocs
  Precompute number of land cells and water cells within r manhattan distance of each cell