Note that case mappings will only be used if mbstring extension is not present.
Normalization data files updated to Unicode 5.1.0; passes the automated tests.
Seem to have long since lost the script I originally used to generate the Utf8Case.php mapping file, which appears not to have been updated since 2002 or so. :)
Made a new one and moved it into the UtfNormal sub-library.
Note a couple limitations:
* Case mapping (still) uses only the 1:1 simple mappings. Any full or locale-specific mappings are ignored.
* These case mappings are not used anyway when the PHP mbstring extension is available; mbstring's case conversion functions are used instead, with whatever version of Unicode support and whatever complex mapping support they may or may not have.
* The generated Utf8Case.php file is not used directly -- you must also regenerate the serialized version in the 'serialized' directory after updating it to a new Unicode version.
* Made lines from initialiseMessages() appear as list items during installation
* Moved the bulk of the localisation data from the Language*.php files to the Messages*.php files. Deleted most of the Languages*.php files.
* Introduced "stub global" framework to provide deferred initialisation of core modules.
* Removed placeholder values for $wgTitle and $wgArticle, these variables will now be null during the initialisation process, until they are set by index.php or another entry point.
* Added DBA cache type, for BDB-style caches.
* Removed custom date format functions, replacing them with a format string in the style of PHP's date(). Used string identifiers instead of integer identifiers, in both the language files and user preferences. Migration should be transparent in most cases.
* Simplified the initialisation API for LoadBalancer objects.
* Removed the broken altencoding feature.
* Moved default user options and toggles from Language to User. Language objects are still able to define default preference overrides and extra user toggles, via a slightly different interface.
* Don't include the date option in the parser cache rendering hash unless $wgUseDynamicDates is enabled.
* Merged LanguageUtf8 with Language. Removed LanguageUtf8.php.
* Removed inclusion of language files from the bottom of Language.php. This is now consistently done from Language::factory().
* Add the name of the executing maintenance script to the debug log. Start the profiler during maintenance scripts.
* Added "serialized" directory, for storing precompiled data in serialized form.
