--random opens and plays the first episode #63.
Refactored `play` command to support new features #84

- Complete #59 (--no-record option)
    - NOTE: This is also available in `--iter` and `--random`.
- Completed #63 (--random or --random-first)
    - `--random` now plays the first random episode instead of creating
    a simulation, `--iter` now does that.
- Adding the initial setup to allow #75 functionality.