dev-manual: Edits to "Introduction" - better wording.

(From yocto-docs rev: ab48642c1800b40d43baf31c9733fd6c832faffc)

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

documentation/dev-manual/dev-manual-intro.xml

@@ -10,18 +10,20 @@
 
         <para>
             Welcome to the Yocto Project Development Manual!
-            This manual gives you an idea of how to use the Yocto Project to
-            develop embedded Linux images and user-space applications to run on
-            targeted devices.
-            Reading this manual gives you an overview of image, kernel, and
+            This manual provides information on how to use the Yocto Project to
+            develop embedded Linux images and user-space applications that
+            run on targeted devices.
+            The manual provides an overview of image, kernel, and
             user-space application development using the Yocto Project.
             Because much of the information in this manual is general, it
             contains many references to other sources where you can find more
             detail.
-            For example, detailed information on Git, repositories and open
-            source in general can be found in many places.
-            Another example is how to get set up to use the Yocto Project,
-            which our Yocto Project Quick Start covers.
+            For example, you can find detailed information on Git, repositories, 
+            and open source in general in many places on the Internet.
+            Another example specific to the Yocto Project is how to quickly 
+            set up your host development system and build an image, which you 
+            find in the 
+            <ulink url='&YOCTO_DOCS_QS_URL;'>Yocto Project Quick Start</ulink>.
             <note>
                 By default, using the Yocto Project creates a Poky distribution.
                 However, you can create your own distribution by providing key