Updated default controller

src/controller.rs

@@ -51,6 +51,9 @@ impl PIController {
             old_h: initial_h,
         }
     }
+    pub fn default() -> Self {
+        Self::new(0.17, 0.04, 10.0, 0.2, 10.0, 0.9, 1e-4)
+    }
 }
 
 #[cfg(test)]