'Return the contents of LICENSE (for omw)
use lang=lang to get the license for an individual language'

def license(self, lang=u'eng'):

    if (lang == u'eng'):
        return self.open(u'LICENSE').read()
    elif (lang in self.langs()):
        return self._omw_reader.open(u'{}/LICENSE'.format(lang)).read()
    elif (lang == u'omw'):
        return self._omw_reader.open(u'LICENSE').read()
    elif (lang in self._lang_data):
        raise WordNetError(u'Cannot    determine    license    for    user-provided    tab    file')
    else:
        raise WordNetError(u'Language    is    not    supported.')
