* switch to composer for qrcode and otp dependencies

* move most OTP-related stuff into userhelper
* remove old phpqrcode and otphp libraries

vendor/chillerlan/php-qrcode/src/Output/QRCodeOutputException.php

@@ -0,0 +1,17 @@
+<?php
+/**
+ * Class QRCodeOutputException
+ *
+ * @filesource   QRCodeOutputException.php
+ * @created      09.12.2015
+ * @package      chillerlan\QRCode\Output
+ * @author       Smiley <smiley@chillerlan.net>
+ * @copyright    2015 Smiley
+ * @license      MIT
+ */
+
+namespace chillerlan\QRCode\Output;
+
+use chillerlan\QRCode\QRCodeException;
+
+class QRCodeOutputException extends QRCodeException{}