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

floorplan/v2/Floorplan.h

@@ -54,6 +54,15 @@ namespace Floorplan {
 		Point3 p4;
 		Quad3(const Point3 p1, const Point3 p2, const Point3 p3, const Point3 p4) : p1(p1), p2(p2), p3(p3), p4(p4) {;}
 		Quad3 operator * (const float v) const {return Quad3(p1*v, p2*v, p3*v, p4*v);}
+		const Point3& operator [] (const int idx) const {
+			switch (idx) {
+			case 0: return p1;
+			case 1: return p2;
+			case 2: return p3;
+			case 3: return p4;
+			default: throw Exception("out of bounds");
+			}
+		}
 	};
 
 	/** additional type-info for obstacles */