calphy-melting-temperature

Compute a melting point with calphy, either automatically with mode: melting_temperature or manually from solid and liquid ts sweeps whose free-energy curves cross, and decide whether the resulting Tm is trustworthy. Use for melting temperatures of single-component or alloy potentials, melting lines at pressure, and for diagnosing "curves do not cross", "Tm is not within range", or a Tm that disagrees with the literature.