many changes and updates

- changed the wifi-estimation api
- adjusted test-cases
- worked on grid-bulding and grid-importance
- new walking modules
- fixed some minor issues

sensors/radio/WiFiGridEstimator.h

@@ -43,13 +43,13 @@ public:
 	 * as nodes only provide a limited number of rssi-entries,
 	 * store only the strongest ones.
 	 */
-	template <typename Node> static void estimate(Grid<Node>& grid, WiFiModel& mdl, const std::vector<LocatedAccessPoint> aps) {
+	template <typename Node> static void estimate(Grid<Node>& grid, WiFiModel& mdl, const std::vector<AccessPoint> aps) {
 
 		// sanity checks
 		Assert::isTrue(Node::getMapAPs().empty(), "there are already some processed APs available!");
 
 		// attach the access-points to the shared node-vector
-		for (const LocatedAccessPoint& ap : aps) {
+		for (const AccessPoint& ap : aps) {
 			Node::getMapAPs().push_back(ap);
 		}
 
@@ -63,7 +63,7 @@ public:
 			for (int apIdx = 0; apIdx < (int) aps.size(); ++apIdx) {
 
 				// estimate the signal-strength
-				const float rssi = mdl.getRSSI(aps[apIdx], n.inMeter());
+				const float rssi = mdl.getRSSI(aps[apIdx].getMAC(), n.inMeter());
 
 				// keep it
 				nodeAPs.push_back(WiFiGridNodeAP(apIdx, rssi));