Merge branch 'master' into svn

git-svn-id: https://plugins.svn.wordpress.org/papercite/trunk@855590 b8457f37-d9ea-0310-8a92-e5e31aec5664
Stable is 0.5.9

git-svn-id: https://plugins.svn.wordpress.org/papercite/trunk@855593 b8457f37-d9ea-0310-8a92-e5e31aec5664