message of Button Maker Pro availability

git-svn-id: https://plugins.svn.wordpress.org/button-maker/trunk@1049288 b8457f37-d9ea-0310-8a92-e5e31aec5664
message of Button Maker Pro availability

git-svn-id: https://plugins.svn.wordpress.org/button-maker/trunk@1049290 b8457f37-d9ea-0310-8a92-e5e31aec5664