Merge pull request #224 from angel-ayala/master

making public  m_model in DroneModel.java

app/src/main/java/sq/rogue/rosettadrone/DroneModel.java

@@ -204,7 +204,7 @@ public class DroneModel implements CommonCallbacks.CompletionCallback {
 
     public float mission_alt = 0;
 
-    Model m_model;
+    public Model m_model;
     Camera m_camera;
     Aircraft m_aircraft;
 
@@ -3095,4 +3095,4 @@ public class DroneModel implements CommonCallbacks.CompletionCallback {
             }
         }
     }
-}
+}