tagging version 0.9.1

git-svn-id: https://plugins.svn.wordpress.org/prepare-new-version/trunk@780430 b8457f37-d9ea-0310-8a92-e5e31aec5664
editing readme.txt

git-svn-id: https://plugins.svn.wordpress.org/prepare-new-version/trunk@780432 b8457f37-d9ea-0310-8a92-e5e31aec5664