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/transcoder/transcoderoptionsmp3.h

@@ -23,6 +23,10 @@
 
 #include "config.h"
 
+#include <QObject>
+#include <QWidget>
+#include <QString>
+
 #include "transcoderoptionsinterface.h"
 
 class Ui_TranscoderOptionsMP3;