Purpose: Enables 2D plotting of the GWP trajectories.
 Usage:   gwptraj [-i -f -o -skip -ver -h -?]

Options : 
 -i DIR  : data is stored in directory DIR
 -f FILE : the wavefunction is read from FILE rather than from ./psi
           The string FILE may be a relative or a full path-name.
 -o FILE : The ouput is written to file FILE.pl rather than to ./gwptraj.pl
           The string FILE may be a relative or a full path-name.
 -skip m : the first m WFs are skipped.
 -task m : On startup plottask is m.
 -1pl    : Do single plot and finish.
 -trj : Write a trajectory file only.
 -scan : Plot coordinate trajectories of each mode in turn.
 -ver    : Version information about the program.
 -h      : Print this help text. 
 -?      : Print this help text. 

  The program is menu driven. Just type "gwptraj"
  and then follow the menu.
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