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/core/thread.cpp

@@ -17,7 +17,10 @@
 
 #include "config.h"
 
+#include <QThread>
+
 #include "thread.h"
+#include "utilities.h"
 
 void Thread::run() {
   Utilities::SetThreadIOPriority(io_priority_);