1.1.0: support wp_mail filter hook; settings

git-svn-id: https://plugins.svn.wordpress.org/disable-emails/trunk@864502 b8457f37-d9ea-0310-8a92-e5e31aec5664
bump readme, changelog has not changed...

git-svn-id: https://plugins.svn.wordpress.org/disable-emails/trunk@864950 b8457f37-d9ea-0310-8a92-e5e31aec5664