update phpmailer to version 5.1
fixed headerinfos
Created 2.8.x branch
Update PHPMailer to version 2.0.4 (ticket #733)
removed PHPMailer fix introduced with 2.0.3 to get SMTP working again (line 1041 in class.smtp.php)
updated external PHPMailer class to latest version (v2.3)
updated PHPMailer framework to version 2.0.0 (/include/phpmailer)
Added Id keywords to all missing files
Added phpmailer class (thanks to doc)