add vcglib

vcglib/apps/QT/trimesh_pos_demo/main.cpp

@@ -0,0 +1,11 @@
+
+#include <QApplication>
+#include "window.h"
+
+int main(int argc, char *argv[])
+{
+    QApplication app(argc, argv);
+    Window wdw;
+    wdw.show();
+    return app.exec();
+}