dijkstra is now bleching fast

deleting from the grid is now bleaching fast
added new helper methods
many new test-cases
many new methods for geo classes and others
added a bunch of new grid-walkers

tests/grid/Plot.h

@@ -140,7 +140,7 @@ public:
 	Plot& fire() {
 		gp.draw(splot);
 		gp.flush();
-		sleep(1000);
+		//sleep(1000);
 		return *this;
 	}