Updated to version 1.5.6

git-svn-id: https://plugins.svn.wordpress.org/kebo-twitter-feed/trunk@923299 b8457f37-d9ea-0310-8a92-e5e31aec5664
Added Spanish Language Files

git-svn-id: https://plugins.svn.wordpress.org/kebo-twitter-feed/trunk@923301 b8457f37-d9ea-0310-8a92-e5e31aec5664