Move folders to their proper composer hierarchy

These were discovered while testing an RDF loader.

Piece 679 [La Native](http://www.mutopiaproject.org/cgibin/piece-info.cgi?id=679) has an Anonymous composer (correct) and is located under Kruetzer (incorrect).

Piece 678 [Ladoiska](http://www.mutopiaproject.org/cgibin/piece-info.cgi?id=678) is composed by Kruetzer (correct)

Pulling this will cause these two files to be properly placed in the archive file hierarchy.