A brave new interface

[sailxjx]

We will design a brave new interactive interface in Di-engine 1.0, including program api and cli commands, which will support most reinforcement learning scenarios, and the rest will be implemented by our elastic atomic components.

Here are some design guidelines for the new interfaces:

1. It should be compatible with the existing configurations, and easy to convert from the old code to the new style.
2. It should be semantic and easy to understand, anyone with little reinforment learning experience will benifit from the policy examples.
3. It should be easy to extend to multi-threaded or distributed environments.

Any suggestions are welcome, please leave your comments in this channel.