2.9.0 Release

git-svn-id: https://plugins.svn.wordpress.org/wp-members/trunk@863710 b8457f37-d9ea-0310-8a92-e5e31aec5664
corrected readme.txt encoding

git-svn-id: https://plugins.svn.wordpress.org/wp-members/trunk@864459 b8457f37-d9ea-0310-8a92-e5e31aec5664