Renamed CSS and layout to move from the old name (HC) to the new name

[selectricity] / app / views / election / edit.rhtml

<h1><strong><%= @election.name %>:</strong> Edit Overview</h1>

<%= start_form_tag :action => 'update', :id => @election %>
  <%= render :partial => 'overview_form' %>
  <%= submit_tag 'Done!' %>
<%= end_form_tag %>