some fixes [multithreading,..]

needed interface changes [new options]
logger for android
wifi-ap-optimization
new test-cases

geo/Angle.h

@@ -56,12 +56,12 @@ public:
 	}
 
 	/** convert degrees to radians */
-	static constexpr float degToRad(const float deg) {
+	static constexpr inline float degToRad(const float deg) {
 		return deg / 180.0f * M_PI;
 	}
 
 	/** convert radians to degrees */
-	static float radToDeg(const float rad) {
+	static constexpr inline float radToDeg(const float rad) {
 		return rad * 180.0f / M_PI;
 	}
 

geo/Point3.h

@@ -105,6 +105,10 @@ struct Point3 {
 				), 1.0f/norm);
 	}
 
+	std::string asString() const {
+		return "(" + std::to_string(x) + ", " + std::to_string(y) + ", " + std::to_string(z) + ")";
+	}
+
 private:
 
 	static inline bool eq(const float a, const float b, const float delta) {return std::abs(a-b) <= delta;}