Expand "General simulation setting choices that could affect free energy calculations"

[fjclark]

Proposed Change

Expand "General simulation setting choices that could affect free energy calculations" slightly. Obviously, this section could easily become bloated, but maybe it would be worth briefly mentioning e.g. recommended integrators? It would be helpful to hear some opinions on this.

Proposed Authors and Reviewers

Please volunteer (before the end of January) to author/ review and state when you're available. Authors, please say roughly when you plan to contribute the changes (no later than the end of May).

Proposed author: Volunteer wanted
Proposed reviewer: Volunteer wanted