documentation: Added brief-yoctoprojectqs to mega-manual

The original QS (yocto-project-qs) has been retired for the YP
sumo (2.5) release.  The manual has been replaced with the
brief, two-page quick build document (brief-yoctoprojectqs).

I needed to create a new title figure for the manual to include
as part of the mega-manual (bypqs-title.png).  The figure was
added to the figures folder of both the bried-yoctoprojectqs
and mega-manual book folders.  I also removed the old
ypqs-title.png file that was used for the original QS.

Updated the stylesheet doc for the brief build to include a
style using the new title .PNG file.

Updated the mega-manual.xml file to include the brief doc and
exclude the original QS.

(From yocto-docs rev: aadec4a70fa89e4dcd233c337d8971c8353ee26d)

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

documentation/mega-manual/mega-manual.xml

@@ -132,14 +132,14 @@
 
     </bookinfo>
 
-<!-- Includes yocto-project-qs -->
+<!-- Includes brief-yoctoprojectqs -->
 
     <para>
-        <imagedata fileref="figures/ypqs-title.png" width="100%" align="left" scalefit="1" />
+        <imagedata fileref="figures/bypqs-title.png" width="100%" align="left" scalefit="1" />
     </para>
 
     <xi:include
-        xmlns:xi="http://www.w3.org/2003/XInclude" href="../yocto-project-qs/qs.xml"/>
+        xmlns:xi="http://www.w3.org/2003/XInclude" href="../brief-yoctoprojectqs/brief-yoctoprojectqs.xml"/>
 
 <!-- Includes getting-started title image and then getting-started chapters -->