Update qrencode.php

/* vv01f added for
        * easier (simple call) and
        * (old browser) compatible
        * no need to write files on servers
       inclusion of qr-codes in php generated html
*/
       
    /* usage:
    *   <?php
    *   require_once('./'."qrcode.class.php");
    *   header("Content-type: text/html");
    *   ob_start();
    *   print('<!doctype html><html><head>
    *      <title>Bitcoin QRCode</title>
    *      <META HTTP-EQUIV="content-type" CONTENT="text/html; charset=utf-8">
    *      <style>
    *      .square {
    *       width: 3px;
    *      	height: 3px;
    *      	float:left;
    *      }
    *      .clear{
    *      	clear: left;
    *      }
    *      .dark{
    *      	background: black;
    *      }
    *      .white{
    *      	background: white;
    *      }
    *   </style></head><body>
    *       <div style="display: inline-block; clear: left; border: 2px solid white; margin-left: 4px;">').
    *   .QRCode::divHTML('text for qrcode')
    *   .'</div></body></html>';
    *   ob_end_flush();
    *   ?>
    */