new Version 2.1.0

git-svn-id: https://plugins.svn.wordpress.org/wp-banner/trunk@868137 b8457f37-d9ea-0310-8a92-e5e31aec5664
svn clean up

git-svn-id: https://plugins.svn.wordpress.org/wp-banner/trunk@868846 b8457f37-d9ea-0310-8a92-e5e31aec5664