performance enhancements

memory enhancements
prevent starting sensors more than once
fix for wifi lag issues
map scaling for huge buildings

ui/map/2D/MapView2D.h

@@ -21,6 +21,7 @@ class MyGridNode;
 class Renderable2D;
 class QSlider;
 class QPushButton;
+class QGestureEvent;
 class ColorPoints2D;
 class Path2D;
 
@@ -127,6 +128,10 @@ public slots:
 	void mousePressEvent(QMouseEvent*);
 	void mouseMoveEvent(QMouseEvent*);
 	void mouseReleaseEvent(QMouseEvent*);
+	void wheelEvent(QWheelEvent*);
+
+	bool event(QEvent*);
+	bool gestureEvent(QGestureEvent *event);
 
 };