These examples are similar to those in the "min" and "neb" folders.
Each example can be run with the following minimization style:
- quickmin:                             qm
- fire:  	                        fire
- fire with optimized options:          fire_mod
- fire with min_modify options to
  reproduce fire/old:                   fire_mod_old
- fire/old (previous implementation):   fire_old

Run the NEB examples as:

mpirun -np 4 lmp_g++ -partition 4x1 -in in.neb.sivac.qm
mpirun -np 4 lmp_g++ -partition 4x1 -in in.neb.sivac.fire
mpirun -np 4 lmp_g++ -partition 4x1 -in in.neb.sivac.fire_mod
mpirun -np 4 lmp_g++ -partition 4x1 -in in.neb.sivac.fire_mod_old
mpirun -np 4 lmp_g++ -partition 4x1 -in in.neb.sivac.fire_old

mpirun -np 8 lmp_g++ -partition 8x1 -in in.neb.sivac.qm
mpirun -np 8 lmp_g++ -partition 8x1 -in in.neb.sivac.fire
mpirun -np 8 lmp_g++ -partition 8x1 -in in.neb.sivac.fire_mod
mpirun -np 8 lmp_g++ -partition 8x1 -in in.neb.sivac.fire_mod_old
mpirun -np 8 lmp_g++ -partition 8x1 -in in.neb.sivac.fire_old

