Copying of FTB instances working again

logic/BaseInstance.h

@@ -25,6 +25,7 @@
 #include "logic/auth/MojangAccount.h"
 
 class QDialog;
+class QDir;
 class Task;
 class MinecraftProcess;
 class OneSixUpdate;
@@ -52,6 +53,7 @@ public:
 	virtual ~BaseInstance() {};
 
 	virtual void init() {}
+	virtual void copy(const QDir &newDir) {}
 
 	/// nuke thoroughly - deletes the instance contents, notifies the list/model which is
 	/// responsible of cleaning up the husk