[gimp-web/testing] Add new screenshots for GIMP 2.10.6.

[Jehan <jehanp src gnome org>]

commit b3a6ab2768f4af60bd0687a23b5e657281773cfb
Author: Jehan <jehan girinstud io>
Date:   Thu Aug 16 16:45:37 2018 +0200

    Add new screenshots for GIMP 2.10.6.
    
    Also we were missing Long Shadow in the new filters.

 .../gimp-2-10-6-little-planet.jpg                  | Bin 0 -> 75182 bytes
 .../gimp-2-10-6-vertical-straighten.jpg            | Bin 0 -> 116093 bytes
 content/news/2018-08_GIMP-2.10.6_Released/index.md |  30 ++++++++++++++++-----
 3 files changed, 23 insertions(+), 7 deletions(-)
---
diff --git a/content/news/2018-08_GIMP-2.10.6_Released/gimp-2-10-6-little-planet.jpg 
b/content/news/2018-08_GIMP-2.10.6_Released/gimp-2-10-6-little-planet.jpg
new file mode 100644
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diff --git a/content/news/2018-08_GIMP-2.10.6_Released/gimp-2-10-6-vertical-straighten.jpg 
b/content/news/2018-08_GIMP-2.10.6_Released/gimp-2-10-6-vertical-straighten.jpg
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differ
diff --git a/content/news/2018-08_GIMP-2.10.6_Released/index.md 
b/content/news/2018-08_GIMP-2.10.6_Released/index.md
index 79745110..8b7feb55 100644
--- a/content/news/2018-08_GIMP-2.10.6_Released/index.md
+++ b/content/news/2018-08_GIMP-2.10.6_Released/index.md
@@ -40,18 +40,32 @@ Thanks to Yoshio ONO for the vertical text implementation!
 
 [East-Asian languages]: https://en.wikipedia.org/wiki/Horizontal_and_vertical_writing_in_East_Asian_scripts
 
-## New "Little Planet" filter.
+## New filters
 
-A new filter makes an entrance: *Little Planet* (based on the `gegl:stereographic-projection` operation).
+Two new filters make an entrance in this release:
+
+### Little Planet (based on the `gegl:stereographic-projection` operation)
 
 <figure>
-<img src="{attach}gimp-2-10-6-little-planet.png" alt="Little Planet filter">
+<img src="{attach}gimp-2-10-6-little-planet.jpg" alt="Little Planet filter">
 <figcaption>
-Little Planet filter in GIMP 2.10.6. TODO
+Little Planet filter in GIMP 2.10.6.<br/>
+<a href="https://commons.wikimedia.org/wiki/Category:Panoramas#/media/File:Ettling_Isar_Panorama.jpg";>Image 
on canvas</a>: <em>Luftbild Panorama der Isar bei Ettling in Niederbayern</em>, by Simon Waldherr,
+(<a href="https://creativecommons.org/licenses/by-sa/4.0";>CC by-sa 4.0</a>).
 </figcaption>
 </figure>
 
-## Improved "Straightening"
+### Long Shadow (based on the `gegl:long-shadow` operation)
+
+<p>
+<video width="960" height="492" controls>
+  <source src="https://download.gimp.org/mirror/pub/gimp/video/v2.10/gimp-2-10-6-long-shadow.webm"; 
type="video/webm">
+  <source src="https://download.gimp.org/mirror/pub/gimp/video/v2.10/gimp-2-10-6-long-shadow.mp4"; 
type="video/mp4">
+Your browser does not support the video tag.
+</video>
+</p>
+
+## Improved "Straighten" (Measure tool)
 
 A lot of people appreciated the new [Horizon Straightening][] feature
 added in GIMP 2.10.4. Yet many of you wanted vertical straightening as
@@ -60,9 +74,11 @@ well. This is now possible.
 [Horizon Straightening]: 
https://www.gimp.org/news/2018/07/04/gimp-2-10-4-released/#simple-horizon-straightening
 
 <figure>
-<img src="{attach}gimp-2-10-6-vertical-straighten.png" alt="Vertical Straightening">
+<img src="{attach}gimp-2-10-6-vertical-straighten.jpg" alt="Vertical Straightening">
 <figcaption>
-Vertical straightening in GIMP 2.10.6. TODO
+Vertical straightening in GIMP 2.10.6.<br/>
+<a 
href="https://en.wikipedia.org/wiki/Wall#/media/File:Western_side_of_the_Great_Mosque_of_Kairouan.jpg";>Image 
on canvas</a>: <em>View of the western enclosing wall of the Great Mosque of Kairouan</em>, by Moumou82,
+(<a href="https://creativecommons.org/licenses/by-sa/2.0/";>CC by-sa 2.0</a>).
 </figcaption>
 </figure>