Update Vidalia Bundle Description (Polipo is not included anymore according to #6013)
According to legacy/trac#6013 polipo is not distributed with vidalia bundle.
www.tpo states otherwise and should be updated.
```
Vidalia Bundle
Windows 7, Vista, and XP
Contains Tor, Vidalia, *Polipo*, and Torbutton for installation on your system. You need your own Firefox, and you'll need to configure other applications if you want them to use Tor. Installation Guide »
```
https://www.torproject.org/download/download.html.en
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