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/playlistheader.h

@@ -23,13 +23,21 @@
 
 #include "config.h"
 
+#include <stdbool.h>
+
+#include <QObject>
+#include <QWidget>
+#include <QList>
+#include <QAction>
+#include <QMenu>
+#include <QSignalMapper>
+#include <QString>
+#include <QtEvents>
+
 #include "widgets/stretchheaderview.h"
 
 class PlaylistView;
 
-class QMenu;
-class QSignalMapper;
-
 class PlaylistHeader : public StretchHeaderView {
   Q_OBJECT