def readme(self):
        try:
            return self.open("README.txt").read()
        except IOError:
            return self.open("README").read()
create a unique signature for any GFF line based on joining
dataset/ETHPy150Open nltk/nltk/nltk/corpus/reader/framenet.py/FramenetCorpusReader.readme--crossover with--dataset/ETHPy150Open tanghaibao/jcvi/formats/gff.py/GffLine.signature