Merge branch 'master' into svn

git-svn-id: https://plugins.svn.wordpress.org/papercite/trunk@998090 b8457f37-d9ea-0310-8a92-e5e31aec5664
Stable is 0.5.13

git-svn-id: https://plugins.svn.wordpress.org/papercite/trunk@998113 b8457f37-d9ea-0310-8a92-e5e31aec5664