Optionally add CPGs to passive modules

[andresgr96]

1. Added option to add CPGs to passive modules in addition to active ones
2. CPGs on passive modules are not assigned a target and thus cannot be controlled and do not produce an output
3. It was discovered that doing so results in better fitness, thus we added the option to do so so users can experiment with it
4. Example scripts that utilized it were updated

[andresgr96]

I've realized that this seemingly small change introduces a fundamental change in the concept of the CPG network we currently use, and thus will require a deeper discussion to add it to the framework.