Tighten the specification of last passage time
Tighten the specification of last passage time

There are now more bounds on the last passage time, with the value being
required to relax to a larger distance, by default being 1. There is
also a bounds that once passing this boundary, the last passage time is
locked in.

malramsay64/MD-Molecules-Hoomd,malramsay64/MD-Molecules-Hoomd