Reorganize source and add libraries

app/main.cpp

@@ -0,0 +1,16 @@
+#include "mainwindow.h"
+#include <QApplication>
+
+int main(int argc, char *argv[])
+{
+    // MacOS directive to prevent the menu bar from being merged into the native bar
+    // i.e. it's in the window, and not the top left of the screen
+    QCoreApplication::setAttribute(Qt::AA_DontUseNativeMenuBar);
+
+    QApplication a(argc, argv);
+    MainWindow w;
+    w.show();
+
+    return a.exec();
+
+}