* src/inst/data_section.hh, src/inst/data_section.cc,
	* src/inst/text_section.hh, src/inst/text_section.cc:
	Maintain a list of encountered (not sorted) labels. Use it to 
	print the content of the sections.
	* src/inst/section.hh: Remove deprecated attributes.
	* src/inst/text_label.hh (get_iterator): Constify return value.