Cleanup for coding style

Add strict mode to check_style_guide script

include/openspace/interaction/controller.h

@@ -39,7 +39,7 @@ public:
     Controller() :
         _handler(nullptr)
     {}
-    
+
     void setHandler(NavigationHandler* handler);
 
 protected:

include/openspace/interaction/interpolator.h

@@ -44,7 +44,7 @@ public:
     void setTransferFunction(std::function<T(float)> transferFunction);
     void setInterpolationTime(float interpolationTime);
     void step();
-    
+
     float deltaTimeScaled() const;
     T value() const;
     bool isInterpolating() const;

include/openspace/interaction/keybindingmanager.h

@@ -42,7 +42,7 @@ class KeyBindingManager : public DocumentationGenerator {
 public:
     KeyBindingManager();
     ~KeyBindingManager() = default;
-    
+
     void resetKeyBindings();
 
     void bindKeyLocal(
@@ -72,7 +72,7 @@ private:
         Synchronized synchronization;
         std::string documentation;
     };
-    
+
     std::string generateJson() const override;
 
     std::multimap<KeyWithModifier, KeyInformation> _keyLua;

include/openspace/interaction/mousestate.h

@@ -36,7 +36,7 @@ struct MouseState {
     MouseState(double scaleFactor);
     void setFriction(double friction);
     void setVelocityScaleFactor(double scaleFactor);
-    
+
     glm::dvec2 previousPosition;
     DelayedVariable<glm::dvec2, double> velocity;
 };

include/openspace/interaction/navigationhandler.h

@@ -58,7 +58,7 @@ public:
     void resetCameraDirection();
 
     void setCameraStateFromDictionary(const ghoul::Dictionary& cameraDict);    
-    
+
     void updateCamera(double deltaTime);
 
     // Accessors

include/openspace/interaction/orbitalnavigator.h

@@ -89,7 +89,7 @@ private:
     SceneGraphNode* _focusNode = nullptr;
     glm::dvec3 _previousFocusNodePosition;
     glm::dquat _previousFocusNodeRotation;
-    
+
     Interpolator<double> _rotateToFocusNodeInterpolator;
     Interpolator<double> _followRotationInterpolator;
 
@@ -117,14 +117,14 @@ private:
      */
     glm::dquat rotateLocally(double deltaTime,
                              const glm::dquat& localCameraRotation) const;
-    
+
     /**
      * Interpolates the local rotation towards a 0 rotation.
      * \returns a modified local rotation interpolated towards 0.
      */
     glm::dquat interpolateLocalRotation(double deltaTime,
                                         const glm::dquat& localCameraRotation);
-    
+
     /**
      * Translates the horizontal direction. If far from the focus object, this will
      * result in an orbital rotation around the object. This function does not affect the