some fixes [multithreading,..]

needed interface changes [new options]
logger for android
wifi-ap-optimization
new test-cases

nav/dijkstra/Dijkstra.h

@@ -30,7 +30,7 @@ public:
 	}
 
 	/** get the dijkstra-pendant for the given user-node. null if none matches */
-	DijkstraNode<T>* getNode(const T& userNode) const {
+	const inline DijkstraNode<T>* getNode(const T& userNode) const {
 		auto it = nodes.find(&userNode);
 		return (unlikely(it == nodes.end())) ? (nullptr) : (it->second);
 	}