maint: use rows() and columns() to clarify m-files. * gradient.m, interp1q.m, rat.m, tsearchn.m, image.m, imwrite.m, area.m, contourc.m, hist.m, isocolors.m, isonormals.m, meshz.m, print.m, __bar__.m, __go_draw_axes__.m, __interp_cube__.m, __marching_cube__.m, __patch__.m, __print_parse_opts__.m, __quiver__.m, rose.m, shrinkfaces.m, stairs.m, surfnorm.m, tetramesh.m, text.m, deconv.m, spline.m, intersect.m, setdiff.m, setxor.m, union.m, periodogram.m, pcg.m, perms.m: Replace size (x,1) with rows (x) and size(x,2) with columns(x).

FCN_FILE_DIRS += time

time_FCN_FILES = \
  time/addtodate.m \
  time/asctime.m \
  time/calendar.m \
  time/clock.m \
  time/ctime.m \
  time/date.m \
  time/datenum.m \
  time/datestr.m \
  time/datetick.m \
  time/datevec.m \
  time/eomday.m \
  time/etime.m \
  time/is_leap_year.m \
  time/now.m \
  time/weekday.m

FCN_FILES += $(time_FCN_FILES)

PKG_ADD_FILES += time/PKG_ADD

DIRSTAMP_FILES += time/$(octave_dirstamp)