Update "include" files to W3C standard

Update the "include" files so that the HTML generated is W3C standard/compliant.

This makes it easier to update all the PHP and INC files later to W3C standard/compliant.

Updated the "loader.js" and "bottom-loader.js" in themes directory due to the update in "/usr/local/www/guiconfig.inc"

At the moment the &lt;body&gt; tag has "link", "alink" and "vlink" defined, but doesn't display correctly, so I've updated "all.css" (will need to update the &lt;body&gt; tag in all the PHP/INC files, but that is a lot of files to update!)

Tidied up the indentation of some of the files with tabs.