update author info

git-svn-id: https://plugins.svn.wordpress.org/txt2img/trunk@1018690 b8457f37-d9ea-0310-8a92-e5e31aec5664
update author info

git-svn-id: https://plugins.svn.wordpress.org/txt2img/trunk@1018694 b8457f37-d9ea-0310-8a92-e5e31aec5664
update readme

git-svn-id: https://plugins.svn.wordpress.org/txt2img/trunk@1018695 b8457f37-d9ea-0310-8a92-e5e31aec5664