rename gui directory to libgu * libgui: Rename from gui. * .hgsub (libgui/qterminal): Rename from gui/qterminal. * Makefile.am (GUIDIR): Set to libgui instead of gui if AMCOND_BUILD_GUI is true. * configure.ac (AC_CONFIG_FILES): Update list for directory renaming. * Makefile.am (.NOTPARALLEL): Delete. List octave.html/index.html as the primary HTML target, not octave.html. (octave.html): New target for making the octave.html directory. (octave.pdf): Depend on octave.dvi. * images.awk: In generated rules for png files, depend on octave.html, not octave.html/index.html. * src/Makefile.am (OCTAVE_GUI_CPPFLAGS, OCTAVE_GUI_LIBS): Update for directory renaming. (CLEANFILES): Fix typo. * fntests.m (src_tree): Use libinterp, not src.

## The `oregonator'.
##
## Reference:
##
##   Oscillations in chemical systems.  IV.  Limit cycle behavior in a
##   model of a real chemical reaction. Richard J. Field and Richard
##   M. Noyes, The Journal of Chemical Physics, Volume 60 Number 5,
##   March 1974.

function dx = oregonator (x, t)

  dx = zeros (3, 1);

  dx(1) = 77.27*(x(2) - x(1)*x(2) + x(1) - 8.375e-06*x(1)^2);
  dx(2) = (x(3) - x(1)*x(2) - x(2)) / 77.27;
  dx(3) = 0.161*(x(1) - x(3));

end