2011-06-27  Andreas J. Guelzow <aguelzow@pyrshep.ca>

	* doc-meta-data.ui: add a keyword tab, remove keywords from
	description tab
	* dialog-doc-metadata.c (dialog_doc_metadata_transform_str_to_docprop_vect):
	implement
	(gnm_docprop_vector_as_string): new
	(dialog_doc_metadata_transform_docprop_vect_to_str): use
	gnm_docprop_vector_as_string
	(dialog_doc_metadata_get_gsf_prop_val_type): a GSF_DOCPROP_VECTOR has
	its own type
	(dialog_doc_metadata_set_gsf_prop_val): check the error value
	(dialog_doc_metadata_set_prop): do not add unnecessary empty properties
	(cb_dialog_doc_metadata_keywords_changed): deleted
	(dialog_doc_metadata_init_description_page): remove keyword support
	(dialog_doc_metadata_update_keywords_changed): new
	(cb_dialog_doc_metadata_keywords_sel_changed): new
	(dialog_doc_metadata_update_keyword_list): new
	(cb_dialog_doc_metadata_keywords_add_clicked): new
	(cb_dialog_doc_metadata_keywords_remove_clicked): new
	(cb_dialog_doc_metadata_keyword_edited): new
	(dialog_doc_metadata_init_keywords_page): new
	(dialog_doc_metadata_update_prop): add argument, change all callers,
	call dialog_doc_metadata_update_keyword_list
	(dialog_doc_metadata_init_widgets): handle new widgets