* src/Makefile.am: Removed "-DGNUMERIC_AUTOFORMATDIR" from INCLUDES.
Now we use a function inside Gnumeric for this.

* src/dialogs/dialog-autoformat.c:
Marked strings for translation (sample data).
(struct AutoFormatInfo): Now we have field current_category_group
(of type FormatTemplateCategoryGroup *) instead of current_category
and category_groups instead of categories.
(cb_get_cell_content): Function g_strtod always uses "C" locale,
used strtod instead.
(templates_load): Mostly new implementation, uses
category_group_get_templates_list().
(cb_remove_current_activated): Now it is implemented.
(cb_canvas_button_release): Showing real category name
(template->category->name). Setting sensitivity of
info->remove_current menu item.
(cb_category_popwin_hide): Used
category_group_list_find_category_by_name when setting
info->current_category_group and category_list_get_names_list
when calling gtk_combo_set_popdown_strings. Selecting "General"
category by default if it exists. Displaying current category
description in the category combo tooltip.

* src/file-autoft.c, src/file-autoft.h: New functions:
gnumeric_sys_autoformat_dir, gnumeric_usr_autoformat_dir,
gnumeric_extra_autoformat_dirs,
category_free, category_get_templates_list, category_list_free,
category_group_free, category_group_get_templates_list,
category_group_list_get, category_group_list_find_category_by_name,
category_group_list_get_names_list, category_group_list_free.
Removed functions: template_list_load, template_list_free,
util_list_free, category_list_load, category_list_free.

* src/format-template.c, src/format-template.h:
New function: format_template_compare_name.
New structs: FormatTemplateCategory and
FormatTemplateCategoryGroup.
(struct FormatTemplate): field category is now of type
FormatTemplateCategory.

* src/gutils.c, src/gutils.h: New functions: g_create_list,
g_lang_score_in_lang_list, g_lang_score_is_better (implemented
as a macro).

* src/xml-io-autoft.c:
(xml_write_format_template_members): Don't write category
information.
(xml_read_format_template_members): Used
xml_search_child_lang_list instead of xml_search_child to find
"Information" node. Ignore category information.
(gnumeric_xml_read_format_template_category): New function.

* src/xml-io-autoft.h: Added
gnumeric_xml_read_format_template_category function declaration.

* src/xml-io.c, src/xml-io.h: New functions:
xml_search_child_lang_list, xml_search_child_no_lang,
xml_search_child_lang_list_with_score (static function).

* templates/autoformat/3D.category,
templates/autoformat/Financial.category,
templates/autoformat/Classical.category,
templates/autoformat/General.category,
templates/autoformat/Colourful.category,
templates/autoformat/List.category:
New files, XML descriptions of default categories.

* templates/autoformat/Makefile.am:
Templates grouped into categories, now every category is installed
in separate directory. Installing *.category files as ".category" in
appropriate directories.