Updated the plugin header to 1.4.1

git-svn-id: https://plugins.svn.wordpress.org/wp-social-avatar/trunk@990491 b8457f37-d9ea-0310-8a92-e5e31aec5664
Updated the readme.txt for 1.4.1

git-svn-id: https://plugins.svn.wordpress.org/wp-social-avatar/trunk@990492 b8457f37-d9ea-0310-8a92-e5e31aec5664