updated docs

docs/docs/index.xml

@@ -182,7 +182,8 @@
                   <li>Implementations of the <a href="imaging.html#get_surf_points">SURF</a>,
                    <a href="imaging.html#hog_image">HOG</a>, and <a href="imaging.html#extract_fhog_features">FHOG</a> 
                    feature extraction algorithms.</li>
-                  <li>Tools for <a href="imaging.html#object_detector">detecting objects</a> in images.</li>
+                  <li>Tools for <a href="imaging.html#object_detector">detecting objects</a> in images including
+                  a <a href="imaging.html#get_frontal_face_detector">frontal face detector</a>.</li>
                </ul>
             </li>