added gps support

added compass support
added ui elements for gps and compass
added support for writing sensor data

sensors/android/SensorFactoryAndroid.h

@@ -9,6 +9,8 @@
 #include "AccelerometerSensorAndroid.h"
 #include "GyroscopeSensorAndroid.h"
 #include "BarometerSensorAndroid.h"
+#include "CompassSensorAndroid.h"
+#include "GPSSensorAndroid.h"
 
 /**
  * sensor factory that provides real hardware sensors from
@@ -34,6 +36,14 @@ public:
 		return BarometerSensorAndroid::get();
 	}
 
+	CompassSensor& getCompass() override {
+		return CompassSensorAndroid::get();
+	}
+
+	GPSSensor& getGPS() override {
+		return GPSSensorAndroid::get();
+	}
+
 };
 
 #endif