Support Poll bars

At the moment, Bootstrap doesn't support Poll bars.

I've solved it by customizing the following templates:
poll-bar.tpl.php and poll-bar--block.tpl.php

like this:

<div class="text"><?php print $title; ?></div>
<div class="progress">
  <div class="progress-bar" role="progressbar" aria-valuenow="<?php print $percentage; ?>" aria-valuemin="0" aria-valuemax="100" style="width: <?php print $percentage; ?>%;">
    <?php print $percentage; ?>% (<?php print format_plural($votes, '1 vote', '@count votes'); ?>)
  </div>
</div>