ENH: equilibrium: Add lazy bool kwarg; remove nprocs, scheduler and pbar kwargs. Make it possible to override the dask scheduler using dask.set_options.
ENH: equilibrium: Add lazy bool kwarg; remove nprocs, scheduler and pbar kwargs. Make it possible to override the dask scheduler using dask.set_options.

tkphd/pycalphad,tkphd/pycalphad,tkphd/pycalphad