Simulate friction for mouse controls

src/sdl.c

@@ -189,6 +189,8 @@ int main(int argc, char* argv[]) {
                     robot_stop(robot);
                 default: break;
 	        }
+            yaw = (int)(yaw * 0.89);
+            pitch = (int)(pitch * 0.89);
 	    }
     }