Finalized the About dialog, made it accessible through the start window

src/Editor/CAboutDialog.cpp

@@ -0,0 +1,14 @@
+#include "CAboutDialog.h"
+#include "ui_CAboutDialog.h"
+
+CAboutDialog::CAboutDialog(QWidget *parent) :
+    QDialog(parent),
+    ui(new Ui::CAboutDialog)
+{
+    ui->setupUi(this);
+}
+
+CAboutDialog::~CAboutDialog()
+{
+    delete ui;
+}