build 190902. vehicle derailment, oil pressure change tweak, inverter sound tweak, car braking logic tweak, flashing alerter ui indicator, departure signal sources reduction, additional train state data exposed to uart interface, additional train state data for python scripts, wind simulation tweak, coupler animation fix

simulationenvironment.h

@@ -40,6 +40,9 @@ public:
     glm::vec3 const &
         wind() const {
             return m_wind.vector; }
+    float const &
+        wind_azimuth() const {
+            return m_wind.azimuth; }
 
 private:
 // types