add proxy suppot for vlsub

[dddeveloperrr]

Hi
I am from Iran and want to use vlsub but there is a problem
opensubtitles.org is blocked in Iran by government, I use Tor to access blocked websites but in the case of vlsub, there isn't a place in config to set proxy so that vlsub could go through that proxy and fetch the subtitles from http://www.opensubtitles.org

I wanted to know is it possible for you to provide proxy capabilities in vlsub config? so that I can set Tor proxies there so that vlsub could fetch subtitles from www.opensubtitles.org???