Don't repeat how to upvote/downvote every line

Make the output more compact by telling the user what the
upvote/downvote commands once at the stop of the output.

Show id, upvotes and downvotes for each entry after the comment,
in the format (id: upvotes, downvotes).

![screen shot 2014-01-26 at 20 59 48](https://f.cloud.github.com/assets/802125/2005035/3f6890c0-86cd-11e3-8fb0-31c87a97d72e.png)