marked a couple of functions as inline
resolved all warnings/hints/notes
added -Ooregvar optimisation (stores frequently used variables in registers, saving ~30k code size)
#include <QtGui/QApplication>
#include "mainwindow.h"
int main(int argc, char *argv[])
{
QApplication a(argc, argv);
MainWindow w;
w.show();
return a.exec();
}