Add Support for Parameter Arrays in Configuration Manager

[mmore500]

For the work I'm doing with DISHTINY, I define the number of hierarchical levels as a parameter. I have other parameters that need to be defined for each hierarchical level. So, there's a variable number of parameters in play. In addition, I need to access these parameters programmatically (i.e. supply an index value and get the parameter value that corresponds to that hierarchical level). Right now, I'm just keeping these parameters in arrays.

For example, the cost of entering the active state is defined for each hierarchical level (e.g. being in the active state might cost -5.0 at the zero level and -4.0 at the one level). For some experiments, only the zero level might be defined. For others, the zero, one, two, and three levels might be defined.

I have a workaround for the moment, but would love a nice tidy way to do this!