Default stylesheet has been updated to be responsive, and to match your theme's appearance as much as possible. That and some code cleanup. Namely, adding `class_exists()` to all classes to avoid potential conflicts.

git-svn-id: https://plugins.svn.wordpress.org/devbuddy-twitter-feed/trunk@777798 b8457f37-d9ea-0310-8a92-e5e31aec5664