ProxyRequest URL encodes URLs giving different behaviour to default node behaviour #133

We have hit a minor gotcha when using node-replay.

The following line URL encodes the URL and request parameters when using record mode in replay: https://github.com/assaf/node-replay/blob/master/src/proxy.js#L44

When running requests through replay, replay will correctly escape a request like https://www.example.com/test?query={"title":"Node replay is great"} to https://www.example.com/test?query=%7B%22title%22%3A%22Node%20replay%20is%20great%22%7D. The node app running locally doesn't encode the URLs. This gave a difference between behaviour during test driven development with replay and behaviour of the node app itself.