Overhaul image, imagesc to use newplot and support low-level invocation form. * scripts/image/image.m: New variable do_new indicates high-level calling form. For high-level invocation, call newplot before __img__. Correct linearity check if vectors are reversed (high-to-low values). Only apply image properties to axes if doing a high-level invocation. * scripts/image/imagesc.m: New variable do_new indicates high-level calling form. Delete subfunction __imagesc__ and incorporate minimal amount of code into imagesc. Only apply climits for high-level invocation.

FCN_FILE_DIRS += geometry

geometry_FCN_FILES = \
  geometry/convhull.m \
  geometry/delaunay3.m \
  geometry/delaunayn.m \
  geometry/delaunay.m \
  geometry/dsearch.m \
  geometry/dsearchn.m \
  geometry/griddata.m \
  geometry/griddata3.m \
  geometry/griddatan.m \
  geometry/inpolygon.m \
  geometry/rectint.m \
  geometry/tsearchn.m \
  geometry/voronoi.m \
  geometry/voronoin.m

FCN_FILES += $(geometry_FCN_FILES)

PKG_ADD_FILES += geometry/PKG_ADD

DIRSTAMP_FILES += geometry/$(octave_dirstamp)