sendMessage via signal plot from file to window,

add severity to messages (black, yellow, red),
add about text,
removed unused texture from resource

QtMeshViewer/Header/MainWindow.h

@@ -13,12 +13,16 @@ public:
 
 private:
 	Ui::MainWindowClass* ui;
+	int m_curSeverity;
 
 private slots:
 	void openFile();
 	void aboutFile();
 	void aboutTool();
 
+public slots:
+	void showMessage(QString message, int severity);
+
 signals:
 	void loadFile(const char*);
 };