* 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/examples/imageWithText.php

@@ -0,0 +1,33 @@
+<?php
+/**
+ * example for additional text
+ * @link https://github.com/chillerlan/php-qrcode/issues/35
+ *
+ * @filesource   imageWithText.php
+ * @created      22.06.2019
+ * @author       Smiley <smiley@chillerlan.net>
+ * @copyright    2019 Smiley
+ * @license      MIT
+ */
+
+namespace chillerlan\QRCodeExamples;
+
+use chillerlan\QRCode\{QRCode, QROptions};
+
+require_once __DIR__.'/../vendor/autoload.php';
+
+$data = 'https://www.youtube.com/watch?v=DLzxrzFCyOs&t=43s';
+
+$options = new QROptions([
+	'version'      => 7,
+	'outputType'   => QRCode::OUTPUT_IMAGE_PNG,
+	'scale'        => 3,
+	'imageBase64'  => false,
+]);
+
+header('Content-type: image/png');
+
+$qrOutputInterface = new QRImageWithText($options, (new QRCode($options))->getMatrix($data));
+
+// dump the output, with additional text
+echo $qrOutputInterface->dump(null, 'example text');