'Returns an easter egg of the API.
:params str say: (optional), pass in what you\'d like Octocat to say
:returns: ascii art of Octocat
:rtype: str (or unicode on Python 3)'

def octocat(self, say=None):

    url = self._build_url(u'octocat')
    req = self._get(url, params={u's': say})
    return (req.text if req.ok else u'')
