you can now send html-mails for RSVP messages

git-svn-id: https://plugins.svn.wordpress.org/events-made-easy/trunk@885849 b8457f37-d9ea-0310-8a92-e5e31aec5664
typo fix for phpmailer class when sending html mails

git-svn-id: https://plugins.svn.wordpress.org/events-made-easy/trunk@885852 b8457f37-d9ea-0310-8a92-e5e31aec5664