Artist.get_similar(reverse=True) fails

Hi,

It appears that the reverse parameter for Artist.get_Similar is currently returning an error:

Artist.get_similar(reverse=True)

returns:

pyechonest.util.EchoNestAPIError: (u'Echo Nest API Error 5: method - Invalid parameter: "reverse" [HTTP 400]',)

It is documented here: http://echonest.github.io/pyechonest/artist.html?highlight=get_similar#pyechonest.artist.Artist.get_similar

Has this method been removed for some reason? Is there some other way to get the most "dissimilar" artists?

Thanks, John