Modifed to allow multiline text and updated custom css field to css editor

git-svn-id: https://plugins.svn.wordpress.org/ditty-news-ticker/trunk@785306 b8457f37-d9ea-0310-8a92-e5e31aec5664
Added an option to force line breaks on carriage returns

git-svn-id: https://plugins.svn.wordpress.org/ditty-news-ticker/trunk@786752 b8457f37-d9ea-0310-8a92-e5e31aec5664