Submitted by Daniel S. Karls (karl0100 |AT| umn DOT edu), University of Minnesota.

This Test Driver computes the total potential energy and forces acting on a
triclinic periodic 3D box of atoms, supplied by the user in the form of an
extended xyz file which lies in the Test's directory.  The extended xyz file
must be of the following form:
Natoms
Lattice=" Ax Ay Az Bx By Bz Cx Cy Cz "
Element positionx positiony positionz
Element positionx positiony positionz
.
.
.
where A, B, and C are the simulation box edge vectors (periodic boundary
conditions).  Element is an integer which species the atomic species code used
by LAMMPS; the order these species codes should start from 1 and corresponds to
the chemical species according to the order of elements specified in
pipeline.stdin.tpl:  the first species given in pipeline.stdin.tpl should
correspond to species 1, the second to species 2, etc.  Note that all entries
in the xyz file are separated by single spaces.

Note: Although the Tests constructed from this Test Driver can be assembled
using `testgenie`, the actual xyz data files for each of the Tests are
contained in xyz_input_files.txz.