[patch] Updating documentation/pt/preparing.sml translation

[Andre Luis Lopes <andrelop@ig.com.br>]

Hi,

Here's another update. This one if for documentation/pt/preparing.sgml.
Lots of changes since the last translation.

Please apply when possible.

-- 
++----------------------------------------------------------------------++
||  Andre Luis Lopes                   andrelop@ig.com.br               ||
||  Debian-BR Project                  http://debian-br.cipsga.org.br   ||
||  Personal Web Site                  http://www.utah.com.br/~andrelop ||      
||  Public GPG KeyID                   9D1B82F6                         ||
||  Keyserver                          wwwkeys.eu.pgp.net               ||

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