Support matching query strings

go/fake-http/README.md

## TODO
- support matching query strings
- refactoring
- /_clear endpoint
- some kind of templating (request info + random functions?)

go/fake-http/fake-http.go

// Match returns a response definition matching the request.
func (rs *Responses) Match(req *http.Request) *Response {
	for _, resp := range *rs {
		if req.Method == resp.Method && req.URL.Path == resp.Path {
		if req.Method == resp.Method && req.URL.String() == resp.Path {
			return &resp
		}
	}