alter the active_class helper to use preloaded votes
alter the active_class helper to use preloaded votes

Rather than calling the DB *every* vote for the existence of the
current users vote, we can just iterate through the preloaded ones we
already have and see if it's there. Saves a fuckload of DB calls.

thomas-mcdonald/qa,thomas-mcdonald/qa,thomas-mcdonald/qa,thomas-mcdonald/qa