
xyz2pdb - convert a XYZ coord file created by ORAC into PDB format,
	  using a PDB template; if the file is from a REM simulation,
	  select one replica or operate on all replicas


 syntax: ./xyz2pdb <xyz_file> <reference_pdb_file> [ <replica-index> | "REM" ]


Since XYZ files created by ORAC do not contain all the info required
by the PDB format (atom types, etc), these must be provided in a
reference PDB file.

An XYZ file coming from a REM simulation contains additional
information; in order to perform the conversion one more parameter
must be given: either "REM" (= convert all frames) or the index of one
replica (= convert frames of this replica only).

xyz2pdb reads from one file and writes to STDOUT.
