Carousel tweaks

Created by: thewilkybarkid

The first commit removes the carousel ID and uses the .campl-carousel class instead as it can be a bit of pain to have a CMS output a specific ID. This is going to be slightly less efficient, but with the amount of JavaScript already present it won't be noticeable.

The second commit restricts some selectors in the carousel implementation to stop it colliding with any other lists present (in my case it was colliding with Drupal's contextual links).