Efficient 'universal' shifted Lennard-Jones model for all KIM API supported species developed by Elliott and Akerson (2015) v003

This is a 'universal' parameterization for the LennardJones612 model driver for all species types supported by the KIM API. The parameterization uses a shifted cutoff so that all interactions have a continuous energy function at the cutoff radius. See the README and params files for more details.