Changed version in files from 2.1 to 2.3

git-svn-id: https://plugins.svn.wordpress.org/wsecure/trunk@985213 b8457f37-d9ea-0310-8a92-e5e31aec5664
Updated the content in readme.txt

git-svn-id: https://plugins.svn.wordpress.org/wsecure/trunk@985216 b8457f37-d9ea-0310-8a92-e5e31aec5664