  Modeling and simulation (M&S) has revolutionized the way modern engineered
products are designed, tested and evaluated. Yet modeling and simulation is
much less frequently applied in the study of natural biological and active
matter systems. Two of the greatest challenges in applying M\&S approaches to
natural biological systems are (1) difficulty in specifying a model, and
developing a simulation from it, and (2) tuning and optimizing parameters. Here
we address the first challenge directly, and develop a software library that
can lead to progress in the second.
