feature: added notification count on the admin menu panel, entry

git-svn-id: https://plugins.svn.wordpress.org/free-guest-post/trunk@860763 b8457f37-d9ea-0310-8a92-e5e31aec5664
bug: it shows one even though the fetch returns 0 on CURL

git-svn-id: https://plugins.svn.wordpress.org/free-guest-post/trunk@860769 b8457f37-d9ea-0310-8a92-e5e31aec5664