modified:   .gitignore
  Added new binary files for sq_curve and step_po, step_van

new file:   lagrange_sqcurve/Makefile.am
new file:   lagrange_sqcurve/sq_curve.cc
  New square curve files

modified:   lagrange_square/run_sqpo.sh
modified:   lagrange_square/sq_po.cc
modified:   lagrange_square/sq_van.cc
  Modified to use the new ray_header.h in the base user_drivers
  directory

new file:   lagrange_step/Makefile.am
new file:   lagrange_step/step_po.cc
new file:   lagrange_step/step_van.cc
  New backwards facing step files

renamed:    lagrange_square/rayheader.h -> lagrange_step/rayheader.h
new file:   rayheader.h
 Moved my header to the base user_drivers directory so it can be
 shared all easily between different problems
deleted:    lagrange_step/rayheader.h
File no longer needed