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

3rdparty/sha2/sha2.h

@@ -35,6 +35,8 @@
 #ifndef __STRAWBERRY_SHA2_H__
 #define __STRAWBERRY_SHA2_H__
 
+#include <stddef.h>
+
 /*
  * Import u_intXX_t size_t type definitions from system headers.  You
  * may need to change this, or define these things yourself in this