Making the next/prev buttons work with version 2 of the JavaScript

git-svn-id: https://plugins.svn.wordpress.org/rotatingtweets/trunk@822233 b8457f37-d9ea-0310-8a92-e5e31aec5664
Simplifying 'next'/'prev' code and fixing a bug on the settings page.

git-svn-id: https://plugins.svn.wordpress.org/rotatingtweets/trunk@822237 b8457f37-d9ea-0310-8a92-e5e31aec5664
Proper sorting out of debugging on admin page...

git-svn-id: https://plugins.svn.wordpress.org/rotatingtweets/trunk@822452 b8457f37-d9ea-0310-8a92-e5e31aec5664
Update to version 1.6.7

git-svn-id: https://plugins.svn.wordpress.org/rotatingtweets/trunk@822466 b8457f37-d9ea-0310-8a92-e5e31aec5664
Version 1.6.7

git-svn-id: https://plugins.svn.wordpress.org/rotatingtweets/trunk@822467 b8457f37-d9ea-0310-8a92-e5e31aec5664