Merge pull request #71 from srgpqt/master

use activerecord query interface instead of deprecated finder methods
add "low quality" story downvote option, reorder
set hotness with score+1 so a single downvote doesn't kill it
Merge pull request #72 from srgpqt/jquery-fixes

fix javascript errors caused by using deprecated/removed jQuery.fn.live
upgraded to rails v4.0.2