Added face.com attribution to the face.html as requested

git-svn-id: https://svn.apache.org/repos/asf/incubator/photark/trunk@1178525 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/photark-ui-admin/src/main/webapp/admin/face.html b/photark-ui-admin/src/main/webapp/admin/face.html
index f22f800..618322b 100644
--- a/photark-ui-admin/src/main/webapp/admin/face.html
+++ b/photark-ui-admin/src/main/webapp/admin/face.html
@@ -114,5 +114,8 @@
 
     </div>
 </div>
+<a href="http://face.com/" title="Face Recognition by face.com">
+<img src="http://static.face.com/badges/badge_3_dark_bg.png" border="0" alt="Face Recognition by face.com">
+</a>
 </body>
 </html>
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