texi2html: Make layout work with IE, cleaner HTML output

texi2html: Make layout work with IE, cleaner HTML output

-) Wrap <div id="main"> around main contents, insert footer at the
   end of this div
-) Fix linebreaks in the TOC HTML code
-) Properly use global variable "our @this_page_toc"

Thanks to "Patrick McCarty" <pnorcks@gmail.com> for the trickery with IE
CSS problems!