Made integral term public in PID

src/control/pid.rs

@@ -90,7 +90,7 @@ pub struct Pid<T: Number> {
     /// Limiter for the derivative term: `-d_limit <= D <= d_limit`.
     pub derivative_limit: T,
     /// Last calculated integral value if [Pid::i_gain] is used.
-    integral_term: T,
+    pub integral_term: T,
     /// Previously found measurement whilst using the [Pid::next_control_output] method.
     prev_measurement: Option<T>,
 }