State component that wraps the OpenAI Gym HTTP API

[sritchie]

Here's a description of the API: https://github.com/openai/gym-http-api/blob/master/README.md

We'll definitely want this to expand out the range of playable games.

[sritchie]

• There's a java client here: https://github.com/eclipse/deeplearning4j/tree/master/gym-java-client
• and a Scala client from last year: https://github.com/michaelw123/gym-scala-client with an accompanying article: https://dzone.com/articles/working-with-openai-gym-in-scala