Declare support for WP 4.1 and Disqus 2.84

git-svn-id: https://plugins.svn.wordpress.org/disqus-notify-content-author/trunk@1051373 b8457f37-d9ea-0310-8a92-e5e31aec5664
Update forgotten 'Stable tag'

git-svn-id: https://plugins.svn.wordpress.org/disqus-notify-content-author/trunk@1051378 b8457f37-d9ea-0310-8a92-e5e31aec5664