Added transport class for MailOutput.

lib/Frs/Output/Transport/MailTransport.php

@@ -0,0 +1,36 @@
+<?php
+
+namespace Frs\Output\Transport;
+
+class MailTransport implements TransportInterface
+{
+    private $recipients;
+    private $subject;
+    private $headers;
+    private $content;
+
+    public function setContent($content)
+    {
+        $this->content = $content;
+    }
+
+    public function setRecipients($recipients)
+    {
+        $this->recipients = $recipients;
+    }
+
+    public function setSubject($subject)
+    {
+        $this->subject = $subject;
+    }
+
+    public function setHeaders($headers)
+    {
+        $this->headers = $headers;
+    }
+
+    public function transmit()
+    {
+        return mail($this->recipients, $this->subject, $this->content, $this->headers);
+    }
+}

lib/Frs/Output/Transport/StdoutTransport.php

@@ -14,5 +14,6 @@ class StdoutTransport implements TransportInterface
     public function transmit()
     {
         echo $this->content;
+        return true;
     }
 }