nunsie

Add exchange Luno

1

Integrate the Luno Exchange **Exchange URL** https://www.luno.com/ **Exchange API URL** https://www.luno.com/en/developers/api **Additional information about Websocket connection** https://www.luno.com/en/developers/api#tag/Streaming-API-(beta) --- Refer to [Contributing Guide](https://github.com/altangent/ccxws/blob/master/CONTRIBUTING.md) for additional information.

would like the ability to preserve each individually downloaded file as opposed to merging all segments into one file.