* speed up hop-to-hop calculations

* better and faster trip clustering: trip tries
* add --write-colors to extract line colors from OSM data
* refactor config parameter names, update default pfaedle.cfg
* add --stats for writing a stats.json file
* add --no-fast-hops, --no-a-star, --no-trie for debugging
* general refactoring

src/pfaedle/router/Stats.h

@@ -0,0 +1,33 @@
+// Copyright 2018, University of Freiburg,
+// Chair of Algorithms and Data Structures.
+// Authors: Patrick Brosi <brosi@informatik.uni-freiburg.de>
+
+#ifndef PFAEDLE_ROUTER_STATS_H_
+#define PFAEDLE_ROUTER_STATS_H_
+
+#include <algorithm>
+#include <iostream>
+#include <string>
+#include "util/String.h"
+
+namespace pfaedle {
+namespace router {
+
+struct Stats {
+  Stats()
+      : totNumTrips(0),
+        numTries(0),
+        numTrieLeafs(0),
+        solveTime(0),
+        dijkstraIters(0) {}
+  size_t totNumTrips;
+  size_t numTries;
+  size_t numTrieLeafs;
+  double solveTime;
+  size_t dijkstraIters;
+};
+
+}  // namespace router
+}  // namespace pfaedle
+
+#endif  // PFAEDLE_ROUTER_STATS_H_