Updated readme.txt

git-svn-id: https://plugins.svn.wordpress.org/step-by-step/trunk@916869 b8457f37-d9ea-0310-8a92-e5e31aec5664
Updated readme.txt

git-svn-id: https://plugins.svn.wordpress.org/step-by-step/trunk@916870 b8457f37-d9ea-0310-8a92-e5e31aec5664