deleting version 1.5

git-svn-id: https://plugins.svn.wordpress.org/wp-social-invitations/trunk@870239 b8457f37-d9ea-0310-8a92-e5e31aec5664
fix in widget class

git-svn-id: https://plugins.svn.wordpress.org/wp-social-invitations/trunk@870242 b8457f37-d9ea-0310-8a92-e5e31aec5664