mega-manual: Added toaster-title.png and code to include toaster-manual

Fixes [YOCTO #6901]

Added the toaster-title.png file to the mega-manual/figures
folder so the Toaster title would show up in the mega-manual.

Added lines so that the mega-manual would include the Toaster
manual file to the mega-manual.

(From yocto-docs rev: 5a4a67e4f140802da133b7bcb480c84b4a8edb63)

Signed-off-by: Scott Rifenbark <scott.m.rifenbark@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

documentation/mega-manual/mega-manual.xml

@@ -101,6 +101,11 @@
     <xi:include
         xmlns:xi="http://www.w3.org/2003/XInclude" href="../ref-manual/ref-manual.xml"/>
 
+<para><imagedata fileref="figures/toaster-title.png" width="100%" align="left" scalefit="1" /></para>
+
+    <xi:include
+        xmlns:xi="http://www.w3.org/2003/XInclude" href="../toaster-manual/toaster-manual.xml"/>
+
 <!--    <index id='index'>
       <title>Index</title>
     </index>