Infrastructure

If we finally click the button to enable redirects from Google Code, users accessing e.g. https://code.google.com/p/dolphin-emu/issues/detail?id=1 will be redirected to https://whatever.we.want/p/dolphin-emu/issues/detail?id=1. We need a redirector service that serves 301s to the right destination for these paths. Bonus points if it also redirects revision paths to github, and wiki paths to github wiki. In case of an unhandled URL, it should redirect to dolphin-emu.org.