Fix cross-document references to 'playbooks' in the modules source.

Update manpages from ansible repo to show when options require args.

Update clean target Makefile so 'rm' doesn't print a useless error
when files aren't found while cleaning.

man.html

@@ -195,7 +195,7 @@ examples of these tools in use.</p>
     <p>
         &copy; Copyright 2012 Michael DeHaan.<br/>
       Last updated on Mar 23, 2012.<br/>
-      Created using <a href="http://sphinx.pocoo.org/">Sphinx</a> 1.0.8.<br/>
+      Created using <a href="http://sphinx.pocoo.org/">Sphinx</a> 1.0.7.<br/>
     </p>
   </div>
 </footer>