Fixed date export format, added quick link

git-svn-id: https://plugins.svn.wordpress.org/ghost/trunk@861295 b8457f37-d9ea-0310-8a92-e5e31aec5664
removed published_at from draft posts

git-svn-id: https://plugins.svn.wordpress.org/ghost/trunk@861940 b8457f37-d9ea-0310-8a92-e5e31aec5664