documentation: several manuals - Notes and links for filename space issue

Fixes [YOCTO_#3396]

Spaces in file and directory names is an issue for the build
system and throws an error when sourcing the environment
setup script.  I added key notes in several areas of the doc
set.  I also added some cross-references to the oe-init-build-env
section in some other areas where running the script is discussed.

(From yocto-docs rev: 1d102e91ba77391096749bd7df6c05b2b695b33f)

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

documentation/dev-manual/dev-manual-newbie.xml

@@ -347,8 +347,13 @@
                 the <filename>poky</filename> Git repository 
                 <filename>git://git.yoctoproject.org/poky</filename>.
                 Sometimes you might here the term "poky directory" used to refer to this 
-                directory structure.</para>
-
+                directory structure.
+                <note>
+                    The OpenEmbedded build system does not support file or directory names that
+                    contain spaces.
+                    Be sure that the Source Directory you use does not contain these types
+                    of names.
+                </note></para>
                 <para>The Source Directory contains BitBake, Documentation, metadata and 
                 other files that all support the Yocto Project. 
                 Consequently, you must have the Source Directory in place on your development 

documentation/poky-ref-manual/ref-structure.xml

@@ -19,6 +19,13 @@
     section in the Yocto Project Development Manual.
 </para>
 
+<note>
+    The OpenEmbedded build system does not support file or directory names that
+    contain spaces.
+    Be sure that the Source Directory you use does not contain these types
+    of names.
+</note>
+
 <section id='structure-core'>
     <title>Top level core components</title>
 
@@ -177,6 +184,15 @@
             <literallayout class='monospaced'>
      $ source &OE_INIT_FILE; ~/mybuilds
             </literallayout>
+            <note>
+                The OpenEmbedded build system does not support file or directory names that
+                contain spaces.
+                If you attempt to run the <filename>&OE_INIT_FILE;</filename> script
+                from a Source Directory that contains spaces in either the filenames
+                or directory names, the script returns an error indicating no such 
+                file or directory.
+                Be sure to use a Source Directory free of names containing spaces.
+            </note>
         </para>
     </section>
 

documentation/poky-ref-manual/usingpoky.xml

@@ -28,7 +28,7 @@
 
         <para>
             The first thing you need to do is set up the OpenEmbedded build environment by sourcing
-            the environment setup script as follows:
+            the <link linkend='structure-core-script'>environment setup script</link> as follows:
             <literallayout class='monospaced'>
      $ source &OE_INIT_FILE; [build_dir]
             </literallayout>

documentation/yocto-project-qs/yocto-project-qs.xml

@@ -407,7 +407,8 @@
                  directory.</para></listitem>
              <listitem><para>The third and fourth commands change the working directory to the
                  <ulink url='&YOCTO_DOCS_DEV_URL;#source-directory'>Source Directory</ulink>
-                 and run the Yocto Project environment setup script.
+                 and run the Yocto Project
+                 <ulink url='&YOCTO_DOCS_REF_URL;#structure-core-script'>environment setup script</ulink>.
                  Running this script defines OpenEmbedded build environment settings needed to
                  complete the build.
                  The script also creates the