Added classes (in addition to IDs). Styling and JS now run off of classes. Added option to allow resizing on fading tweets.

git-svn-id: https://plugins.svn.wordpress.org/wp-jtweets/trunk@863316 b8457f37-d9ea-0310-8a92-e5e31aec5664
Changes to read as Compatible with 3.8.1

git-svn-id: https://plugins.svn.wordpress.org/wp-jtweets/trunk@863320 b8457f37-d9ea-0310-8a92-e5e31aec5664