Associations between input mappings and output mappings

[StephenCWills]

Need a way to define relationships between an analytic's inputs and outputs. With relationships defined, input objects can have a direct reference to the corresponding output objects to make it easier on the analytic developer to determine where results should go. Best use case would be for array types.

Relationship would need to be stored as a file, like the mappings, and the openECA Framework would need to create the reference for the analytic.