Be sure to import this file after Bootstrap's carousel css. Add the 'vertical' class to your carousel, like so:
<div class='carousel vertical' id='myCarousel'>
<div class='carousel-inner'>
...
</div>
</div>The CSS located in the Master Branch was created and tested with Bootstrap 2. There is a "bootstrap3" branch which contains some small fixes needed to make it work with Bootstrap 3. These changes were helpfully submitted by @SuggeElson, though I have not had the chance to test them personally at this time.
@SuggeElson has also provided a .LESS file in that branch.