updated readme

git-svn-id: https://plugins.svn.wordpress.org/landing-pages-builder/trunk@909312 b8457f37-d9ea-0310-8a92-e5e31aec5664
updated wordpress version

git-svn-id: https://plugins.svn.wordpress.org/landing-pages-builder/trunk@909314 b8457f37-d9ea-0310-8a92-e5e31aec5664