[Feature Request] Option to disable fire-reset in Atari environments

[hrpan]

Motivation

Currently, the Atari wrappers include fire-reset by default and there is no way to disable it. However, this wrapper is not used in standard Atari experiments. (see openai/baselines#240 for discussion)

Solution

Add an option to disable it.

Checklist

• I have checked that there is no similar issue in the repo (required)