Includes, comments and bugfixes

- Fix includes
- Use common regex (Song::kCoverRemoveDisc) for removing Disc/CD from album
- Remove Disc/CD from album when creating hash
- Make imobiledevice support compile
- Fix setting device on windows

3rdparty/qtsingleapplication/qtlocalpeer.h

@@ -40,9 +40,9 @@
 #ifndef QTLOCALPEER_H
 #define QTLOCALPEER_H
 
+#include <QObject>
+#include <QString>
 #include <QLocalServer>
-#include <QLocalSocket>
-#include <QDir>
 
 #include "qtlockedfile.h"