yocto-project-qs, ref-manual: Moved YP intro from QS to ref-manual

Fixes [YOCTO #11630]

The introductory stuff in the QS is really conceptual information and
needs to be in the ref-manual where YP is introduced.  Regarding the
QS, all we really need to do is point to places where the reader can
go to find that stuff out.

Part of this move involved getting the diagram of the YP flow for
the environment from the QS to the ref-manual.  That figure was
named "YP-flow-diagram.png".  It was named "yocto-environment.png"
in the QS but I renamed it when moving it to the ref-manual.  This
caused some edits to the "Makefile" to clean up the figure lists
for tarballs.

(From yocto-docs rev: ab108c0959e3a9f36d25080245482f8a790c8c87)

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

@@ -161,82 +161,6 @@
         </para>
     </section>
 
-    <section id='yp-intro'>
-        <title>Introducing the Yocto Project Development Environment</title>
-
-        <para>
-            The Yocto Project through the OpenEmbedded build system provides an
-            open source development environment targeting the ARM, MIPS,
-            PowerPC, and x86 architectures for a variety of platforms
-            including x86-64 and emulated ones.
-            You can use components from the Yocto Project to design, develop,
-            build, debug, simulate, and test the complete software stack using
-            Linux, the X Window System, GTK+ frameworks, and Qt frameworks.
-        </para>
-
-        <mediaobject>
-            <imageobject>
-                <imagedata fileref="figures/yocto-environment.png"
-                    format="PNG" align='center' width="8in"/>
-            </imageobject>
-         </mediaobject>
-
-        <para>
-            Here are some highlights for the Yocto Project:
-        </para>
-
-        <itemizedlist>
-            <listitem><para>
-                Provides a recent Linux kernel along with a set of system
-                commands and libraries suitable for the embedded
-                environment.
-                </para></listitem>
-            <listitem><para>
-                Makes available system components such as X11, GTK+, Qt,
-                Clutter, and SDL (among others) so you can create a rich user
-                experience on devices that have display hardware.
-                For devices that do not have a display or where you wish to
-                use alternative UI frameworks, these components need not be
-                installed.
-                </para></listitem>
-            <listitem><para>
-                Creates a focused and stable core compatible with the
-                OpenEmbedded project with which you can easily and reliably
-                build and develop.
-                </para></listitem>
-            <listitem><para>
-                Fully supports a wide range of hardware and device emulation
-                through the Quick EMUlator (QEMU).
-                </para></listitem>
-            <listitem><para>
-                Provides a layer mechanism that allows you to easily extend
-                the system, make customizations, and keep them organized.
-                </para></listitem>
-        </itemizedlist>
-
-        <para>
-            You can use the Yocto Project to generate images for many kinds
-            of devices.
-            As mentioned earlier, the Yocto Project supports creation of
-            reference images that you can boot within and emulate using QEMU.
-            The standard example machines target QEMU full-system
-            emulation for 32-bit and 64-bit variants of x86, ARM, MIPS, and
-            PowerPC architectures.
-            Beyond emulation, you can use the layer mechanism to extend
-            support to just about any platform that Linux can run on and that
-            a toolchain can target.
-        </para>
-
-        <para>
-            Another Yocto Project feature is the Sato reference User
-            Interface.
-            This optional UI that is based on GTK+ is intended for devices with
-            restricted screen sizes and is included as part of the
-            OpenEmbedded Core layer so that developers can test parts of the
-            software stack.
-        </para>
-    </section>
-
     <section id='yp-resources'>
         <title>Setting Up to Use the Yocto Project</title>