Option to use a proxy for connecting to provider sites

I have a privoxy proxy running through tor running on my network, and thought it would be a good idea to use that to get around the increasing number of isp blocks (i'm in the uk) when connecting to providers (tpb etc.)

I've only added the proxy settings in the helper.py, thepiratebay.py and kat.py so far. 

just wanted to see what you think about doing it this way