Add proxy(tor) support

[CtrlAltDefeat94]

As most of the cloud server providers are banned from accessing the API, I think it'd be a good idea to add proxy support(such as Tor). That way, we can still use our servers for scanning for pokemon.

[Azryyal]

Use https://forwardhq.com/

[onlyby]

Proxy will be better, how we can add a proxy to this app?

[cdhowie]

This is something that is already supported by the Python library that makes the HTTPS requests. Just set the https_proxy environment variable and point it at an HTTP->SOCKS proxy like Privoxy that's pointed at the Tor SOCKS proxy.

On *nix systems, you can also use the tsocks utility directly with Tor, without the need for an HTTP->SOCKS intermediate proxy. It is packaged for many Linux distributions.