WordPress Social Login relooking and refactoring

git-svn-id: http://plugins.svn.wordpress.org/wordpress-social-login@652178 b8457f37-d9ea-0310-8a92-e5e31aec5664
update license

git-svn-id: http://plugins.svn.wordpress.org/wordpress-social-login@652182 b8457f37-d9ea-0310-8a92-e5e31aec5664