Add paste.pound-python.org

[Karol Kuczmarski]

Straightforward Basic gist host.

The language seems to be baked into the gist itself there, and not any particular link to it, though, so if we want to extract it it, we'd need to look at the HTML code. (Specifically for a .lang-$LANG CSS class of div#paste). But since this would only be for gisht info, it's very low priority.

Example paste: https://paste.pound-python.org/show/EGVEeDuanaGoaUy33Ydi/
Proposed host ID: ppp