[svn r10895] add php-gd as a dependency

documentation/dependencies.html

@@ -28,7 +28,7 @@
 <h2>Dependencies</h2>
 <ul>
   <li> Apache 1.3 or 2</li>
-  <li> PHP5.0.0+ with MySQL bindings. Progressive upload bar only works with PHP5.2.0+, although PHP4.3.0 will work for most things. </li>
+  <li> PHP5.0.0+ with MySQL bindings and php-gd extension to allow Dokeos to resize pictures. Progressive upload bar only works with PHP5.2.0+, although PHP4.3.0 will work for most things. </li>
   <li> MySQL database server </li>
 </ul>
 <br/>