Album titles are not sorted/played by title number

[Schaaf, Martin]

If you select the artist and then an album you seem to get the files back sorted by file name and not by song index.
This seems to come from using the getIndexes and getMusicDirectoryAPI instead of getArtists, getArtist and getAlbum API.
Using this API would also allow showing artist and album names by tag and not by folder name.

Please see File structure vs ID3 tags on http://www.subsonic.org/pages/api.jsp

Thank you in advance for taking a change to this API into account.