Fixed some processing issues and updated to API v3

git-svn-id: https://plugins.svn.wordpress.org/8tracks-shortcode/trunk@893296 b8457f37-d9ea-0310-8a92-e5e31aec5664
Getting ready for 1.1

git-svn-id: https://plugins.svn.wordpress.org/8tracks-shortcode/trunk@893302 b8457f37-d9ea-0310-8a92-e5e31aec5664