Created a partial to DRY the aja voting method. Modified the voter class to

have both a FullVoter and QuickVoter `types`. Also changed the index and review
methods so that they are more error resistant in the face of ajax voting.
Application.rb now includes the sort_candidates method from
quickvote_controller so all election types can use it. Also updated the
election results pages so that they don't throw errors any more. (Show and Hide
details)