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

src/playlist/queuemanager.h

@@ -23,14 +23,15 @@
 
 #include "config.h"
 
+#include <QObject>
+#include <QWidget>
 #include <QDialog>
+#include <QString>
 
 class Playlist;
 class PlaylistManager;
 class Ui_QueueManager;
 
-class QModelIndex;
-
 class QueueManager : public QDialog {
   Q_OBJECT
 
@@ -58,4 +59,3 @@ private:
 };
 
 #endif  // QUEUEMANAGER_H
-