Documentation: add a section on the "Simulation Settings" tab

[jmarrec]

Enhancement Request

Seems like we never actually talk about the "Simulation Settings" tab anywhere in the OpenStudio Application docs. https://openstudiocoalition.org/getting_started/running_your_simulation/

Detailed Description

https://openstudiocoalition.org/getting_started/creating_your_model/ also doesn't mention it. But I think it's best if it's on the "running your simulation" page.

Originally opened in February 2015 on NREL/OpenStudio#1415

Possible Implementation

Add a quick section on the "Simulation Settings" tab and the options it presents