* Use enums for different settings types
* Enum for overlay settings
* Configurable simulation overlay
* Use duration type for network behaviour delays
* Configurable simulation nodes
* Runner for different node types
* Seedable rng
* Convert settings to required objects
* Implement IOStreamSettings deserialization
* Use common run method for different node types
* Configuration for simapp
* Testcase for region distribution
* Use unix time if seed is not provided
gusto