[release-notes/gnome-3-20] Add screenshot of nightly xdg-apps

[Andreas Nilsson <andreasn src gnome org>]

commit a14aafa408d3f7b8999d2ebee0c628fc2a0173f0
Author: Andreas Nilsson <anilsson redhat com>
Date:   Tue Mar 15 14:59:36 2016 +0100

    Add screenshot of nightly xdg-apps

 help/C/developers.page     |    2 +-
 help/C/figures/xdg-app.png |  Bin 0 -> 267516 bytes
 help/Makefile.am           |    3 ++-
 3 files changed, 3 insertions(+), 2 deletions(-)
---
diff --git a/help/C/developers.page b/help/C/developers.page
index 3ea5101..7023936 100644
--- a/help/C/developers.page
+++ b/help/C/developers.page
@@ -79,7 +79,7 @@
 
   <section id="xdg-app">
     <title>xdg-app</title>
-    <media type="image" src="figures/placeholder.png"/>
+    <media type="image" src="figures/xdg-app.png"/>
     <p><link href="https://wiki.gnome.org/Projects/SandboxedApps";>xdg-app
     </link> is the new GNOME framework for building and distributing
     applications. It makes it possible to create applications that can be used
diff --git a/help/C/figures/xdg-app.png b/help/C/figures/xdg-app.png
new file mode 100644
index 0000000..881f8e1
Binary files /dev/null and b/help/C/figures/xdg-app.png differ
diff --git a/help/Makefile.am b/help/Makefile.am
index 98109ad..eeb1334 100644
--- a/help/Makefile.am
+++ b/help/Makefile.am
@@ -21,6 +21,7 @@ HELP_MEDIA = \
  figures/dconf-editor.png \
  figures/nibbles.png \
  figures/location-services-privacy.png \
- figures/media-controls.png
+ figures/media-controls.png \
+ figures/xdg-app.png
 
 HELP_LINGUAS = cs es gl