yocto-project-qs: Updated the YP Development Flow figure

The figure that Scott Garman used for an old video cast is
much more appealing to the eye than the giant, square beast
the current manual was using.  I have replaced the image.
The image is technically the same.

Because the mega-manual has to use a duplicate figure, I
put the new PNG files in the Figures directory for both the
yocto-project-qs and mega-manual books.

(From yocto-docs rev: ed64810e59110418d49fb6d3e61967fa62ab28c8)

Signed-off-by: Scott Rifenbark <srifenbark@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

documentation/yocto-project-qs/yocto-project-qs.xml

@@ -64,7 +64,8 @@
             tool, to construct complete Linux images.
             The BitBake and OE components are combined together to form
             a reference build host, historically known as
-            <ulink url='&YOCTO_DOCS_DEV_URL;#poky'>Poky</ulink>.
+            <ulink url='&YOCTO_DOCS_DEV_URL;#poky'>Poky</ulink>
+            (<emphasis>Pah</emphasis>-key).
         </para>
 
         <para>
@@ -145,11 +146,8 @@
         <mediaobject>
             <imageobject>
                 <imagedata fileref="figures/yocto-environment.png"
-                    format="PNG" align='center' scalefit='1' width="100%"/>
+                    format="PNG" align='center' width="8in"/>
             </imageobject>
-            <caption>
-                <para>The Yocto Project Development Environment</para>
-            </caption>
          </mediaobject>
 
         <para>