Move to more PSR-4 standards.

lib/OpenPgP/Exceptions/PacketTagException.php

@@ -0,0 +1,14 @@
+<?php
+
+namespace Leenooks\OpenPGP\Exceptions;
+
+class PacketTagException extends \Exception
+{
+	protected $message = 'Packet class missing tag value';
+
+	public function __construct($message, $code = 0, Exception $previous = null)
+	{
+		if ($message)
+			$this->message = $message;
+	}
+}