Adding first version of my plugin

git-svn-id: https://plugins.svn.wordpress.org/wp-update-notification/trunk@780354 b8457f37-d9ea-0310-8a92-e5e31aec5664
Adding version 1.3

git-svn-id: https://plugins.svn.wordpress.org/wp-update-notification/trunk@780355 b8457f37-d9ea-0310-8a92-e5e31aec5664