update readme (fix #724)
update readme (fix #724)

syshk/commafeed,RavenB/commafeed,syshk/commafeed,syshk/commafeed,Athou/commafeed,ahmadassaf/CommaFeed-RSS-Reader,wesley1001/commafeed,RavenB/commafeed,Hubcapp/commafeed,wesley1001/commafeed,ebraminio/commafeed,RavenB/commafeed,Hubcapp/commafeed,Athou/commafeed,Hubcapp/commafeed,zhangzuoqiang/commafeed,ahmadassaf/CommaFeed-RSS-Reader,zhangzuoqiang/commafeed,syshk/commafeed,ebraminio/commafeed,RavenB/commafeed,wesley1001/commafeed,ahmadassaf/CommaFeed-RSS-Reader,wesley1001/commafeed,ahmadassaf/CommaFeed-RSS-Reader,Athou/commafeed,zhangzuoqiang/commafeed,zhangzuoqiang/commafeed,ebraminio/commafeed,Athou/commafeed,ebraminio/commafeed,Hubcapp/commafeed