Move files into src/

src/main.cpp

@@ -0,0 +1,12 @@
+#include "mainwindow.h"
+#include <QApplication>
+
+int main(int argc, char *argv[])
+{
+    QApplication a(argc, argv);
+    a.setStyle("fusion");
+    MainWindow w;
+    w.show();
+
+    return a.exec();
+}