started to add ble functions

added ble as sensor to java and c++
added sensorlistener for ble
added ble to observation and onDataSensor in filter
started to work on ble fingerprints for optimization

Settings.h

@@ -39,7 +39,7 @@ namespace Settings {
 
 	namespace WiFiModel {
 
-        constexpr float sigma = 8.0; //TODO: im Museum hatten wir 8.0
+        constexpr float sigma = 10.0; //TODO: im Museum hatten wir 8.0
 
 		/** if the wifi-signal-strengths are stored on the grid-nodes, this needs a grid rebuild! */
         constexpr float TXP = -45;