mono/tools/locale-builder

* purpose

This tool is to generate globalization information from Unicode CLDR, with some changes
to fill the gap between .NET(Windows)-ism and the global standard.

* input resources

There is only an external resource: unicode CLDR. It can be downloaded from
http://www.unicode.org/Public/cldr/

CLDR specificatin can be found at http://www.unicode.org/reports/tr35/

All content has to me extracted into CLDR folder. The latest version used is 21.

There is an extra mono resource included in this directory called lcids.xml for LCIDs. It's
extracted from National Language Support (NLS) API Reference.
http://msdn.microsoft.com/en-us/goglobal/bb896001.aspx

* generated file

culture-info-table.h contains the following sections:

- datetime_format_entries
See DateTimeFormatEntry.AppendTableRow() in DateTimeFormatEntry.cs.
- number_format_entries
See NumberFormatEntry.AppendTableRow() in NumberFormatEntry.cs.
- culture_entries
See CultureInfoEntry.AppendTableRow() in CultureInfoEntry.cs.
- culture_name_entries
See Driver.Run() in Driver.cs.
- region_entries
See RegionInfoEntry.AppendTableRow() in RegionInfoEntry.cs.
- region_name_entries
See Driver.Run() in Driver.cs.
- locale_strings
See Driver.Run() in Driver.cs.

In each entry, strings are extracted to locale_strings table, and in each structure they are
represented as an index to the string.

* updating the data

Update Makefile.am to get the latest CLDR data. However, CLDR is not complete and
it's missing data for many rarely used cultures. In such cases we provide empty value
but when someone has the knowleadge what the values should be it's recommended to
use online CLDR tool to fill the data gap.

To create the files used by the runtime after an update, run:
make culture-table
make install-culture-table

At the start of Makefile.am there are additional instructions for specific builds.