Added contributing institutions to credits

documentation/credits.html

@@ -530,6 +530,16 @@ of information requests and organizing great community events</li>
   <li> Joel Porras for help fixing bugs during code sprint 2011-01-16</li>
 </ul>
 
+<h1>Contributing institutions (only registered since 2010)</h1>
+These institutions have either contributed to the Chamilo project directly or through hiring services to contribute to Chamilo from an official provider:
+<ul>
+  <li>Universidad San Ignacio de Loyola, Lima, Peru</li>
+  <li>Universidad Tecnológica del Perú, Lima, Peru</li>
+  <li>Universidad de Tocantins, Tocantins, Brazil</li>
+  <li>Gobierno Regional del Callao, Callao, Peru</li>
+</ul>
+
+
 <h1>Removed developments</h1>
 <ul>
   <li>Rich Text Editor (WYSIWYG html editor),  Kevin Roth<br />