[happybirthdaygnome-web] Add group photo from GUADEC in Manchester

[Tom Tryfonidis <tomtryf src gnome org>]

commit 374caec34d7da8770a5ea25fc9cf81b928f3ca5b
Author: Tom Tryfonidis <tomtryf gnome org>
Date:   Sat Aug 12 01:32:02 2017 +0300

    Add group photo from GUADEC in Manchester

 images/group_photo_guadec_manchester.jpg |  Bin 0 -> 2002910 bytes
 index.html                               |    4 +++-
 2 files changed, 3 insertions(+), 1 deletions(-)
---
diff --git a/images/group_photo_guadec_manchester.jpg b/images/group_photo_guadec_manchester.jpg
new file mode 100644
index 0000000..eea6af5
Binary files /dev/null and b/images/group_photo_guadec_manchester.jpg differ
diff --git a/index.html b/index.html
index e349de5..57e89e5 100644
--- a/index.html
+++ b/index.html
@@ -193,7 +193,9 @@
                 <div class="col-xs-12">
                 <p class="h3 text-center">The GNOME community consists of hundreds of people worldwide, 
users and contributors alike.</p>
                 <p>On <a href="https://www.gnome.org/friends/"; target="_blank">Friends of GNOME</a> you can 
learn a little bit more about some of the people that contribute to GNOME and even adopt a hacker. With your 
Friends of GNOME donations you’ll receive a special postcard from the hacker of your choice.</p>
-                <img class="img-responsive" src="./images/group_photo_carlushe.jpg" alt="Group photo of 
GNOME contributors at GUADEC 2016 (Karlsruhe)"></div>
+                <a data-footer="GUADEC 2017 Group Photo by Jonathan Kang (CC BY-SA 2.0)" 
data-gallery="GUADEC Group Photos" data-toggle="lightbox" href="./images/group_photo_guadec_manchester.jpg">
+                    <img class="img-responsive" src="./images/group_photo_guadec_manchester.jpg" alt="Group 
photo of GNOME contributors at GUADEC 2017 (Manchester)"></div>
+                </a>
             </div>
         </div>
     </section>