[gnome-documents] appdata: Add screenshots for Books

[Debarshi Ray <debarshir src gnome org>]

commit 1876b685d9c82af254af8f94df4e60faed468be1
Author: Debarshi Ray <debarshir gnome org>
Date:   Tue Dec 8 17:35:41 2015 +0100

    appdata: Add screenshots for Books
    
    https://bugzilla.gnome.org/show_bug.cgi?id=747565

 data/org.gnome.Books.appdata.xml.in |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)
---
diff --git a/data/org.gnome.Books.appdata.xml.in b/data/org.gnome.Books.appdata.xml.in
index d53d153..9a44d02 100644
--- a/data/org.gnome.Books.appdata.xml.in
+++ b/data/org.gnome.Books.appdata.xml.in
@@ -21,6 +21,11 @@
       <_li>Allow opening full featured editor for non-trivial changes</_li>
     </ul>
   </description>
+  <screenshots>
+    <screenshot 
type="default">https://git.gnome.org/browse/gnome-documents/plain/data/screenshots/gnome-books-1.png</screenshot>
+    
<screenshot>https://git.gnome.org/browse/gnome-documents/plain/data/screenshots/gnome-books-2.png</screenshot>
+    
<screenshot>https://git.gnome.org/browse/gnome-documents/plain/data/screenshots/gnome-books-3.png</screenshot>
+  </screenshots>
   <url type="homepage">https://wiki.gnome.org/Apps/Books</url>
   <updatecontact>debarshir_at_gnome.org</updatecontact>
 </application>