Fixed cpplint.py warnings (#215)

* Fixed cpplint.py [build/include_order] and [build/include_what_you_use] warnings
* Fixed cpplint.py [readability/casting] warnings
* Updated .styleguide format
* Fixed cpplint.py [build/header_guard] warnings

wpilibc/shared/include/PIDController.h

@@ -7,6 +7,11 @@
 
 #pragma once
 
+#include <atomic>
+#include <memory>
+#include <queue>
+#include <string>
+
 #include "Base.h"
 #include "Controller.h"
 #include "HAL/cpp/priority_mutex.h"
@@ -16,11 +21,6 @@
 #include "PIDSource.h"
 #include "Timer.h"
 
-#include <memory>
-
-#include <atomic>
-#include <queue>
-
 class PIDOutput;
 
 /**