added option for nofollow for social links

git-svn-id: https://plugins.svn.wordpress.org/starbox/trunk@808183 b8457f37-d9ea-0310-8a92-e5e31aec5664
added option for nofollow for social links

git-svn-id: https://plugins.svn.wordpress.org/starbox/trunk@808185 b8457f37-d9ea-0310-8a92-e5e31aec5664