[xml] small HTML glitches

[<oliverst online de>]

I recognised a few cosmetic things in the HTMLs of the libxml website.

downloads.html
- around the mailto: to "Igor Zlatkovic" there is a unnecessary <p>.
doesn't look so good with a line break directly after the name
- There is an extra whitespace between the first and surname
- The link to the win32 directory should start after the leading
whitespace
- The link to "Gnome CVS base" is obsolete. The cvs on the gnome server
is gone since months

ChangeLog.html
- Has links to "Parser API", "Tree API" and "Reader API" in the menu on
teh left side and those are dead links. I guess those can be removed.
This also applies to the ChangeLog.html of libxslt.