remarkup button html & css style

git-svn-id: https://plugins.svn.wordpress.org/feedly-insight/trunk@853583 b8457f37-d9ea-0310-8a92-e5e31aec5664
0.6.0 bump

git-svn-id: https://plugins.svn.wordpress.org/feedly-insight/trunk@853584 b8457f37-d9ea-0310-8a92-e5e31aec5664