Released Plugin v1.0

git-svn-id: https://plugins.svn.wordpress.org/wp-subscribe/trunk@1007129 b8457f37-d9ea-0310-8a92-e5e31aec5664
Updated readme.txt 

git-svn-id: https://plugins.svn.wordpress.org/wp-subscribe/trunk@1007131 b8457f37-d9ea-0310-8a92-e5e31aec5664