Rtgym

This release reflects the new OpenAI Gym API (0.26). Since version gym 0.26 introduced major breaking changes, these breaking changes are reflected in the `rtgym` which is becward incompatible with previous versions.

See https://github.com/openai/gym/releases/tag/0.26.0

Breaking changes:
- `step` now returns `terminated` and `truncated` instead of the old `done`
- `reset` now returns the `info` dict
- some method names have changed in the interface according to the new nomenclature

The default action is now correctly appended to the action buffer on reset() when the "reinitialize buffer" option is off.

CAUTION: this release is slightly backward incompatible (default max episode length is now infinite)

- Default max episode length is now infinite instead of being 1000 time-steps.

CAUTION: This release is backward incompatible.

- More advanced and useful benchmarks (backward incompatibility: benchmarks() now returns a dictionary of tuples)
- Support for info dictionaries (backward incompatibility: get_obs_rew_done() is replaced by get_obs_rew_done_info())

Changelog:
- wait_on_done now works as expected
- fixed typos in the readme
- more keywords for pypi

First release