Updating stable tag.

git-svn-id: https://plugins.svn.wordpress.org/s2member/trunk@793717 b8457f37-d9ea-0310-8a92-e5e31aec5664
Updating readme.txt file.

git-svn-id: https://plugins.svn.wordpress.org/s2member/trunk@793723 b8457f37-d9ea-0310-8a92-e5e31aec5664
Updating stable tag.

git-svn-id: https://plugins.svn.wordpress.org/s2member/trunk@793875 b8457f37-d9ea-0310-8a92-e5e31aec5664