fixed dijkstra memleak

new dijkstra interfaces and abort options
refactored all files accordingly
enable logging via compile-time defines

grid/walk/GridWalkShortestPathControl.h

@@ -108,7 +108,7 @@ public:
 		gen.seed(1234);
 
 		// build all shortest path to reach th target
-		dijkstra.build(target, target, acc);
+		dijkstra.build(&target, acc);
 
 	}