modified:   peeters.m

   Fix up parse errors due to \p in comment.

modified:   ../phy487/twoAtomBasisRectangularLatticeDispersionRelationDemo.nb

   Add in dispersion relation plots.  Have to rework to make it so that that plot is not re-drawn when time is animated.
modified:   ../phy487/twoAtomBasisRectangularLatticeDispersionRelationDemo.nb