SHERLOCK: Finish implementation of song / songs debugger commands

This adds support for Rose Tattoo and 3DO version of Serrated
Scalpel.

engines/sherlock/resources.h

@@ -29,6 +29,7 @@
 #include "common/hash-str.h"
 #include "common/rect.h"
 #include "common/str.h"
+#include "common/str-array.h"
 #include "common/stream.h"
 #include "graphics/surface.h"
 
@@ -139,6 +140,11 @@ public:
 	 */
 	int resourceIndex() const;
 
+	/**
+	 * Produces a list of all resource names within a file. Used by the debugger.
+	 */
+	void getResourceNames(const Common::String &libraryFile, Common::StringArray &names);
+
 	/**
 	 * Decompresses LZW compressed data
 	 */