Updated user guide.

* Added Maciej Baluta's GCI work on NetworkStatus, PowerStatus and
  ProcessController with only minor changes.
* Created a page for Daniel Marth's GCI work, based on the wiki page at
  https://dev.haiku-os.org/wiki/SystemBinCommands
* Updated translations mostly for Japanese and Italian from the currently 
  running GCI tasks.

Thanks everyone!


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@39724 a95241bf-73f2-0310-859d-f6bbb57e9c96

docs/userguide/jp/attributes.html

@@ -44,7 +44,7 @@
 <span>
  «  <a href="filetypes.html">Filetypes</a> 
 ::  <a href="contents.html" class="uplink">Contents</a> 
-::  <a href="index.html">Index</a>  »
+::  <a href="index.html">目次</a>  »
 </span></div>
 </div>
 
@@ -164,7 +164,7 @@ Clara Botters : string : Whelton</pre>
 <div class="inner"><span>
  «  <a href="filetypes.html">Filetypes</a> 
 ::  <a href="contents.html" class="uplink">Contents</a> 
-::  <a href="index.html">Index</a>  »
+::  <a href="index.html">目次</a>  »
 </span></div>
 </div>