Added print statements showing time spent in various parts of the terrain generation
Commented out some debug print statements to make logs less busy
Accelerated closest-border-vertex search using kdtree
Gave argument to toggle on or off the use of a kdtree for acceleration in calculateAllClosestBorderVertex
Added prints to help determine speed gains, if any achieved through the use of a kdtree
Switched (back?) to using C kdTree
missing import
Accelerated river drawing by placing all verts in a single draw call
Increased pass requirement for matching hexes to land therefore fitting hexagons to mask shape more tightly