cintype:  type of input file (xyz or pdb)
xyz
cpos:  name of input file (xyz or pdb)
ethane_0001.xyz
natm:  number of atoms
8
lconnect:  true if computing bonds, false if reading them from pdb file
.true.
ucv1:  unit cell lattice vector 1
100.0 0.0 0.0
ucv2:  unit cell lattice vector 2 (mag 26.60572, angle_xy=74.64294)
0.0 100.0 0.0
ucv3:  unit cell lattice vector 3
0.0 0.0  100.0
lpdb:  apply periodic boundary conditions
.true.
limproper:  include calculation of improper modes
.true.
nimproper: number of entries in improper database
2
cimproper:  name of improper database input file
improper_input.txt
lcharge:  include calculation of charges
.true.
ncharge: number of entries in charge database
2
ccharge:  name of charge database input file
charge_input.txt
ldoublecount:  list i-j and j-i neighbors
.true.
