certain feeds cannot be parsed

[leonstafford]

例：

• https://www.reddit.com/r/haskell/.rss
• http://distrowatch.com/news/dw.xml

Steps to reproduce:

• cabal install && cabal run
• open reddit - Haskell

Expected result:

• see list of Haskell posts on Reddit

Actual result:

• get following output in app:

no_title

Plan to isolate issue

• [x] see if feed validity matters - did not, current feeds working in rss.yml don't validate w3c tool
• [ ] build table of what feed versions/schemas are working/which are broken

[leonstafford]

@lotz84 この間mergeしたPR誠にありがとうございます！

失礼じゃなければ、ぼくをこのissueにassignしてくれば嬉しい〜

[lotz84]

お願いします :pray: