set the update server, and fixed some readme text

README.md

@@ -46,19 +46,19 @@ Copyright (c) 2002-2015:
 > Compiled into an installer for Joomla 3 by [Llewellyn van der Merwe] (mailto:joomla@vdm.io) at [Vast Development Method] (https://www.vdm.io/)
 
 # Usage in Joomla (PHP)
-`
+```php
 // Import TCPDF library
 jimport('tcpdf.tcpdf');
-`
+```
 or
-`
+```php
 // Import TCPDF library
 require_once JPATH_LIBRARIES . '/tcpdf/tcpdf.php';
-`
+```
 Now you can create a new PDF document:
-'
+```php
 $pdf = new TCPDF();
-'
+```
 
 # Documentation
 + [Source Code Documentation] (http://www.tcpdf.org)
@@ -68,4 +68,4 @@ $pdf = new TCPDF();
 This library is integrated with Joomla's automatic updates. Before updating it's mandatory that you check that your documents still work as expected.
 
 # License
-TCPDF is licensed under LGPL ([GNU LESSER GENERAL PUBLIC LICENSE] (https://github.com/tecnickcom/TCPDF/blob/develop/LICENSE.TXT))
+TCPDF is licensed under LGPL ([GNU LESSER GENERAL PUBLIC LICENSE] (https://github.com/vdm-io/tcpdf/blob/master/tcpdf/LICENSE.TXT))

tcpdf.xml

@@ -14,4 +14,11 @@
     <files>
         <folder>tcpdf</folder>
     </files>
+    
+    <updateservers>
+        <server type="extension" priority="2"
+            name="TCPDF-Joomla-Library Update Server">http://raw.githubusercontent.com/vdm-io/tcpdf/master/updates/extension.xml</server>
+        <server type="extension" priority="1"
+             name="TCPDF-Joomla-Library Update Server (HTTPS)">https://raw.githubusercontent.com/vdm-io/tcpdf/master/updates/extension.xml</server>
+    </updateservers>
 </extension>