Added more information to readme.txt


git-svn-id: https://plugins.svn.wordpress.org/marctv-galleria/trunk@1034484 b8457f37-d9ea-0310-8a92-e5e31aec5664
Fixed version number.


git-svn-id: https://plugins.svn.wordpress.org/marctv-galleria/trunk@1034489 b8457f37-d9ea-0310-8a92-e5e31aec5664