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/engine/directsounddevicefinder.h

@@ -25,7 +25,7 @@
 
 #include <rpc.h>
 
-#include "engine/devicefinder.h"
+#include "devicefinder.h"
 
 class DirectSoundDeviceFinder : public DeviceFinder {
  public: