update tz-link.htm to add mkdir tz and cd tz like in README

[Anuko Support]

Dear Gilles Espinasse,

Thank you for your contribution. I will pass your update to our Time
Tracker team.

Best Regards,

Anuko Support.

On Sun, Dec 5, 2010 at 1:45 PM, Gilles Espinasse <g.esp at free.fr> wrote:
> I just followed the instructions in tz-link.htm before to see there is no
> top directory in tz*.tar.gz
>
> To avoid that same mistake for others, please find a patch that update
> tz-link.htm to have the same instructions than in README ( with  mkdir tz
> and cd tz before wget)
>
> Gilles
>