updated pricing description

git-svn-id: https://plugins.svn.wordpress.org/wishpond-social-campaigns/trunk@861984 b8457f37-d9ea-0310-8a92-e5e31aec5664
added copyright information

git-svn-id: https://plugins.svn.wordpress.org/wishpond-social-campaigns/trunk@862713 b8457f37-d9ea-0310-8a92-e5e31aec5664
updated pricing information

git-svn-id: https://plugins.svn.wordpress.org/wishpond-social-campaigns/trunk@864391 b8457f37-d9ea-0310-8a92-e5e31aec5664
added another tag in readme

git-svn-id: https://plugins.svn.wordpress.org/wishpond-social-campaigns/trunk@866315 b8457f37-d9ea-0310-8a92-e5e31aec5664