Added a Doxygen summary of the new GUI-related classes.

src/GUI/UMANSOpenGLWidget.h

@@ -30,6 +30,9 @@
 
 class UMANSQtGuiApplication;
 
+/// <summary>Contains the visualization and behavior of the UMANS GUI application. 
+/// This class includes functions for drawing simulation details on the screen, 
+/// and functions that respond to interaction with UI elements.</summary>
 class UMANSOpenGLWidget : public QOpenGLWidget
 {
 	Q_OBJECT
@@ -110,9 +113,7 @@ private:
 	bool makeScreenshotsPerFrame;
 	bool writeCSVOutput;
 
-	/// <summary>
-	/// The part of the world that is currently being shown in the OpenGL widget.
-	/// </summary>
+	/// <summary>The part of the world that is currently being shown in the OpenGL widget.</summary>
 	QRectF viewBounds;
 
 	/// <summary>The width and height of theis OpenGL widget, in pixels.</summary>

src/GUI/UMANSQtGuiApplication.h

@@ -27,6 +27,7 @@
 
 class OGLWidget;
 
+/// <summary>Wrapper for the UMANS GUI application.</summary>
 class UMANSQtGuiApplication : public QWidget
 {
 	Q_OBJECT

src/GUI/VisualizationData.h

@@ -26,6 +26,8 @@
 #include <QOpenGLVertexArrayObject>
 #include <QOpenGLBuffer>
 
+/// <summary>A struct that can contain data to be shown on the screen. 
+/// Used by the UMANSOpenGLWidget class in the UMANS GUI application.</summary>
 struct VisualizationData
 {
 private: