Add FAQ to menu and documentation fixes

docs/content/bugs.md

@@ -21,6 +21,9 @@ about directories.
 You can work round this to some extent with the`purge` command which
 will delete everything under the path, **inluding** empty directories.
 
+This may be fixed at some point in
+[Issue #100](https://github.com/ncw/rclone/issues/100)
+
 ### Directory timestamps aren't preserved ##
 
 For the same reason as the above, rclone doesn't have a concept of a

docs/layouts/chrome/navbar.html

@@ -19,6 +19,7 @@
                     <li><a href="/docs/"><i class="fa fa-book"></i> Usage</a></li>
                     <li><a href="/changelog/"><i class="fa fa-book"></i> Changelog</a></li>
                     <li><a href="/bugs/"><i class="fa fa-book"></i> Bugs</a></li>
+                    <li><a href="/faq/"><i class="fa fa-book"></i> FAQ</a></li>
                     <li><a href="/licence/"><i class="fa fa-book"></i> Licence</a></li>
                     <li><a href="/authors/"><i class="fa fa-book"></i> Authors</a></li>
                   </ul>