sdk-manual: Edits to "Adding Node.js Modules"

Fixed a few sentences up by providing clearer text.

(From yocto-docs rev: e81984d73c05f2d722bc082a100d01c3cc0173ab)

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

documentation/sdk-manual/sdk-extensible.xml

@@ -1363,11 +1363,9 @@
                             found" errors.
                             </para></listitem>
                         <listitem><para>
-                            In order to support adding
+                            In order to support adding Node.js modules, a
-                            Node.js modules, a
+                            <filename>nodejs</filename> recipe must be part
-                            <filename>nodejs</filename> recipe must be part of your
+                            of your SDK.
-                            SDK in order to provide Node.js
-                            itself.
                             </para></listitem>
                     </itemizedlist>
                 </note>
@@ -1376,14 +1374,15 @@
             <para>
                 As mentioned earlier, you can also add Node.js modules
                 directly from a repository or local source tree.
-                To add modules this way, use <filename>devtool add</filename> in
+                To add modules this way, use <filename>devtool add</filename>
-                the following form:
+                in the following form:
                 <literallayout class='monospaced'>
      $ devtool add https://github.com/diversario/node-ssdp
                 </literallayout>
-                In this example, <filename>devtool</filename> fetches the specified
+                In this example, <filename>devtool</filename> fetches the
-                Git repository, detects that the code is Node.js code, fetches
+                specified Git repository, detects the code as Node.js
-                dependencies using <filename>npm</filename>, and sets
+                code, fetches dependencies using <filename>npm</filename>, and
+                sets
                 <ulink url='&YOCTO_DOCS_REF_URL;#var-SRC_URI'><filename>SRC_URI</filename></ulink>
                 accordingly.
             </para>