[release-notes/gnome-3-20] add gtk screenshot

[Allan Day <allanday src gnome org>]

commit d4e35332433fd947274fdea56d5782710717bbf9
Author: Allan Day <allanpday gmail com>
Date:   Wed Mar 23 11:39:52 2016 +0000

    add gtk screenshot

 help/C/developers.page |    2 +-
 help/C/figures/gtk.gif |  Bin 0 -> 195947 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 9c5f11d..801ccec 100644
--- a/help/C/developers.page
+++ b/help/C/developers.page
@@ -131,7 +131,7 @@
 
   <section id="gtk+">
     <title>GTK+</title>
-    <media type="image" src="figures/placeholder.png"/>
+    <media type="image" src="figures/gtk.gif"/>
     <p>3.20 is a big release for GTK+. CSS theming has had a major overhaul,
     resulting in significant improvements, with easier theme writing, more
     exact visual styling and more dynamic interfaces. GTK+ themes now
diff --git a/help/C/figures/gtk.gif b/help/C/figures/gtk.gif
new file mode 100644
index 0000000..aa7ad1f
Binary files /dev/null and b/help/C/figures/gtk.gif differ
diff --git a/help/Makefile.am b/help/Makefile.am
index 9c54457..763eb40 100644
--- a/help/Makefile.am
+++ b/help/Makefile.am
@@ -28,6 +28,7 @@ HELP_MEDIA = \
  figures/polari.png \
  figures/builder.png \
  figures/os-upgrades.png \
- figures/software-reviews.png
+ figures/software-reviews.png \
+ figures/gtk.gif
 
 HELP_LINGUAS = cs de es fr gl hu ja ko lt pl pt_BR sv tr uk