added several grid-walks

added new helper methods/classes (e.g. for heading)
new test cases
optimize the dijkstra
cleanups/refactoring
added timed-benchmarks to the log
many more...

misc/Time.h

@@ -0,0 +1,21 @@
+#ifndef TIME_H
+#define TIME_H
+
+#include <chrono>
+
+class Time {
+
+public:
+
+	static std::chrono::system_clock::time_point tick() {
+		return std::chrono::system_clock::now();
+
+	}
+
+	static int diffMS(std::chrono::system_clock::time_point tick1, std::chrono::system_clock::time_point tick2) {
+		return std::chrono::duration_cast<std::chrono::milliseconds>(tick2 - tick1).count();
+	}
+
+};
+
+#endif // TIME_H