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 += prefs

prefs_PRIVATE_FCN_FILES = \
  prefs/private/loadprefs.m \
  prefs/private/prefsfile.m \
  prefs/private/saveprefs.m

prefs_FCN_FILES = \
  prefs/addpref.m \
  prefs/getpref.m \
  prefs/ispref.m \
  prefs/prefdir.m \
  prefs/preferences.m \
  prefs/rmpref.m \
  prefs/setpref.m \
  $(prefs_PRIVATE_FCN_FILES)

FCN_FILES += $(prefs_FCN_FILES)

PKG_ADD_FILES += prefs/PKG_ADD

DIRSTAMP_FILES += prefs/$(octave_dirstamp)