New Unicode character properties, from Unicode 5.2.0.

New Unicode character properties, from Unicode 5.2.0.

* lib/unictype.in.h (UC_PROPERTY_CASED, UC_PROPERTY_CASE_IGNORABLE,
UC_PROPERTY_CHANGES_WHEN_LOWERCASED,
UC_PROPERTY_CHANGES_WHEN_UPPERCASED,
UC_PROPERTY_CHANGES_WHEN_TITLECASED,
UC_PROPERTY_CHANGES_WHEN_CASEFOLDED,
UC_PROPERTY_CHANGES_WHEN_CASEMAPPED,
uc_is_property_cased, uc_is_property_case_ignorable,
uc_is_property_changes_when_lowercased,
uc_is_property_changes_when_uppercased,
uc_is_property_changes_when_titlecased,
uc_is_property_changes_when_casefolded,
uc_is_property_changes_when_casemapped): New declarations.
* lib/unictype/pr_byname.gperf: Add the new properties.
* modules/unictype/property-byname (Depends-on): Depend on the new
properties modules.
* modules/unictype/property-all (Depends-on): Likewise.
* MODULES.html.sh (Unicode string functions): Add
unictype/property-case-ignorable, unictype/property-cased,
unictype/property-changes-when-casefolded,
unictype/property-changes-when-casemapped,
unictype/property-changes-when-lowercased,
unictype/property-changes-when-titlecased,
unictype/property-changes-when-uppercased.