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

simulation/frc_gazebo_plugins/limit_switch/src/external_limit_switch.cpp

@@ -7,6 +7,8 @@
 
 #include "external_limit_switch.h"
 
+#include <string>
+
 ExternalLimitSwitch::ExternalLimitSwitch(sdf::ElementPtr sdf) {
   sensor = std::dynamic_pointer_cast<sensors::ContactSensor>(
       sensors::get_sensor(sdf->Get<std::string>("sensor")));

simulation/frc_gazebo_plugins/limit_switch/src/external_limit_switch.h

@@ -7,8 +7,6 @@
 
 #pragma once
 
-#include "switch.h"
-
 #ifdef _WIN32
 #include <Winsock2.h>
 #endif
@@ -17,6 +15,8 @@
 #include <gazebo/gazebo.hh>
 #include <gazebo/sensors/sensors.hh>
 
+#include "switch.h"
+
 using namespace gazebo;
 
 class ExternalLimitSwitch : public Switch {

simulation/frc_gazebo_plugins/limit_switch/src/internal_limit_switch.cpp

@@ -7,6 +7,8 @@
 
 #include "internal_limit_switch.h"
 
+#include <string>
+
 InternalLimitSwitch::InternalLimitSwitch(physics::ModelPtr model,
                                          sdf::ElementPtr sdf) {
   joint = model->GetJoint(sdf->Get<std::string>("joint"));

simulation/frc_gazebo_plugins/limit_switch/src/internal_limit_switch.h

@@ -7,14 +7,15 @@
 
 #pragma once
 
-#include "switch.h"
-
 #ifdef _WIN32
 #include <Winsock2.h>
 #endif
+
 #include <gazebo/gazebo.hh>
 #include <gazebo/physics/physics.hh>
 
+#include "switch.h"
+
 using namespace gazebo;
 
 class InternalLimitSwitch : public Switch {

simulation/frc_gazebo_plugins/limit_switch/src/limit_switch.h

@@ -7,17 +7,17 @@
 
 #pragma once
 
-#include "simulation/gz_msgs/msgs.h"
-
-#include "switch.h"
-
-#include "external_limit_switch.h"
-#include "internal_limit_switch.h"
+#include <string>
 
 #include <gazebo/gazebo.hh>
 #include <gazebo/physics/physics.hh>
 #include <gazebo/transport/transport.hh>
 
+#include "external_limit_switch.h"
+#include "internal_limit_switch.h"
+#include "simulation/gz_msgs/msgs.h"
+#include "switch.h"
+
 using namespace gazebo;
 
 /**

simulation/frc_gazebo_plugins/limit_switch/src/switch.h

@@ -9,7 +9,7 @@
 
 class Switch {
  public:
-  virtual ~Switch() {}
+  virtual ~Switch() = default;
 
   /// \brief Returns true when the switch is triggered.
   virtual bool Get() = 0;