Disqus Better User Avatars

This is an addon avatar enhancement for the Disqus module (https://www.drupal.org/project/disqus). For now it adds a more robust user avatar check (compatible with file entity) to make sure that disqus SSO gets the correct user avatar for comments. It also allows you to set an image style for the avatar. Disqus recommends sending a 128X128 picture, so this allows for better cropping and a potentially reduced file size (some sites have large profile photos) when Disqus requests and downloads the image.