Fix Ben's updated feed URL.
Don't let lib/blogs.rb completely die when it encounters a missing feed.
Update tweets task to use mandatory 1.1 Twitter API.

- Required setting Heroku configs...
  TWITTER_CONSUMER_KEY
  TWITTER_CONSUMER_SECRET
  TWITTER_OAUTH_TOKEN
  TWITTER_OAUTH_TOKEN_SECRET
Merge pull request #5 from cldwalker/use-v1.1-twitter-api

Use v1.1 twitter api