readme.txt updated


git-svn-id: https://plugins.svn.wordpress.org/gallery-bank/trunk@1022980 b8457f37-d9ea-0310-8a92-e5e31aec5664
update readme.txt

git-svn-id: https://plugins.svn.wordpress.org/gallery-bank/trunk@1022981 b8457f37-d9ea-0310-8a92-e5e31aec5664