FEATURE New DateField and TimeField form classes with more consistent API and easier localization
API CHANGE Date/time parsing in DateField, TimeField and DatetimeField defaults to i18n::get_locale() ('en_US') instead of using en_NZ/en_GB specific parsing. Use i18n::set_locale('en_NZ') in mysite/_config.php to revert to old behaviour.
API CHANGE $timeformat constructor parameter in TimeField needs to be in ISO date notation (not PHP's date())
API CHANGE TimeField, DateField and related subclasses use Zend_Date for date parsing, meaning they're stricer than the previously used strtotime()
API CHANGE Removed DMYCalendarDateField and CalendarDateField, use DateField with setConfig('showcalendar')
API CHANGE Removed CompositeDateField, DMYDateField, use DateField with setConfig('dmyfields')
API CHANGE Removed DropdownTimeField, use TimeField with setConfig('showdropdown')
API CHANGE Removed PopupDateTimeField, use DatetimeField
API CHANGE Changed 'date', 'month' and 'year' HTML field names to lowercase in DMYDateField
API CHANGE Removed support for ambiguous date formats in DateField, e.g. '06/03/03'. Use DateField->setConfig('dateformat', '<format>') to revert to this behaviour.
API CHANGE Removed $futureOnly flag from DateField, CalendarDateField etc., use DateField->setConfig('min') and DateField->setConfig('max')
ENHANCEMENT Using Zend_Date for DateField and TimeField, with more robust date handling, starting localization support. Set globally via i18n::set_locale(), or for a field instance through setLocale(). Note: Javascript validation is not localized yet.
git-svn-id: svn://svn.silverstripe.com/silverstripe/open/modules/sapphire/branches/2.4@99360 467b73ca-7a2a-4603-9d3b-597d59a354a9
