dev-manual, ref-manual: Rewrote the adding a package title

Second thoughts caused me to adjust this title again.
Also fixed the cross-ref in the FAQ.

(From yocto-docs rev: 0553790236c60d30306b796587cd5b5213456aff)

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

documentation/dev-manual/dev-manual-common-tasks.xml

@@ -699,11 +699,10 @@
     </section>
 
     <section id='usingpoky-extend-addpkg'>
-        <title>Adding a Package to Your Image</title>
+        <title>Writing a Recipe to Add a Package to Your Image</title>
 
         <para>
-            To add a package to your image, you need to write a recipe 
-            for the package.
+            Recipes add packages to your image.
             Writing a recipe means creating a <filename>.bb</filename> file that sets some
             variables.
             For information on variables that are useful for recipes and for information about recipe naming

documentation/ref-manual/faq.xml

@@ -153,7 +153,7 @@
             <para>
                 To add a package, you need to create a BitBake recipe.
                 For information on how to add a package, see the section
-                "<ulink url='&YOCTO_DOCS_DEV_URL;#usingpoky-extend-addpkg'>Adding a Package to Your Image</ulink>"
+                "<ulink url='&YOCTO_DOCS_DEV_URL;#usingpoky-extend-addpkg'>Writing a Recipe to Add a Package to Your Image</ulink>"
                 in the Yocto Project Development Manual.
             </para>
         </answer>