raystack 0.4.0

WIP SkySpark client
Documentation
# raystack

A SkySpark 3 client library for Rust.

## Documentation
See [docs.rs](https://docs.rs/raystack/0.1.0/raystack/).

## Features
* SkySpark REST API `eval` operation.
* Partial implementation of the Project Haystack REST API.
    * Most Haystack ops have been implemented.
    * Some Haystack ops (like watches) are unimplemented because I haven't looked into how I can test them.

## Future Plans
* Switch to async/await once the Rust ecosystem matures in a few months.
* Refine the public API.


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Many thanks to Steve Eynon for his [post about SkySpark's SCRAM authentication](http://www.alienfactory.co.uk/articles/skyspark-scram-over-sasl).