even better readme.txt


git-svn-id: https://plugins.svn.wordpress.org/wp-redis/trunk@992323 b8457f37-d9ea-0310-8a92-e5e31aec5664
Moar readme

git-svn-id: https://plugins.svn.wordpress.org/wp-redis/trunk@992325 b8457f37-d9ea-0310-8a92-e5e31aec5664