Update DecorInfo to scan for decorators

Look in system and user packaged and non-packaged decorator directories.

headers/private/interface/DecorInfo.h

@@ -8,6 +8,7 @@
 #define DECOR_INFO_H
 
 
+#include <Directory.h>
 #include <Entry.h>
 #include <Locker.h>
 #include <ObjectList.h>
@@ -121,6 +122,8 @@ public:
 private:
 			DecorInfo*			_FindDecor(const BString& path);
 
+			status_t			_ScanDecorators(BDirectory decoratorDirectory);
+
 private:
 			BObjectList<DecorInfo> fList;
 			BLocker				fLock;