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 += help

help_PRIVATE_FCN_FILES = \
  help/private/__additional_help_message__.m \
  help/private/__strip_html_tags__.m

help_FCN_FILES = \
  help/__gripe_missing_component__.m \
  help/__makeinfo__.m \
  help/__unimplemented__.m \
  help/doc.m \
  help/doc_cache_create.m \
  help/get_first_help_sentence.m \
  help/help.m \
  help/lookfor.m \
  help/print_usage.m \
  help/type.m \
  help/which.m \
  $(help_PRIVATE_FCN_FILES)

FCN_FILES += $(help_FCN_FILES)

PKG_ADD_FILES += help/PKG_ADD

DIRSTAMP_FILES += help/$(octave_dirstamp)