adding post-summarizer by marcocampana

git-svn-id: https://plugins.svn.wordpress.org/post-summarizer/trunk@84049 b8457f37-d9ea-0310-8a92-e5e31aec5664
Adding first release of the plugin

git-svn-id: https://plugins.svn.wordpress.org/post-summarizer/trunk@86734 b8457f37-d9ea-0310-8a92-e5e31aec5664
fixed tags metadata

git-svn-id: https://plugins.svn.wordpress.org/post-summarizer/trunk@86738 b8457f37-d9ea-0310-8a92-e5e31aec5664
fixed numbers in bullet lists

git-svn-id: https://plugins.svn.wordpress.org/post-summarizer/trunk@86740 b8457f37-d9ea-0310-8a92-e5e31aec5664