updates to readme.txt file.

git-svn-id: https://plugins.svn.wordpress.org/buzztarget/trunk@882477 b8457f37-d9ea-0310-8a92-e5e31aec5664
updated version number.

git-svn-id: https://plugins.svn.wordpress.org/buzztarget/trunk@882483 b8457f37-d9ea-0310-8a92-e5e31aec5664