added g+ and linked in support

git-svn-id: https://plugins.svn.wordpress.org/couponsindemand/trunk@1036025 b8457f37-d9ea-0310-8a92-e5e31aec5664
updated stable tag number

git-svn-id: https://plugins.svn.wordpress.org/couponsindemand/trunk@1036031 b8457f37-d9ea-0310-8a92-e5e31aec5664