[threeten-dev] Review request for changes to support Hijrah variants

[roger riggs]

Hi,

Please review the changes to support multiple Islamic calendar variants:
  - Only the Umm alQura variant is supported so far and is supported by 
limited
    placeholder data until the full data can be acquired and validated.
  - Tests have been updated to work with the updated API and available data
  - The use of Locale 'ca' and 'cv' values has been added to 
Chronology.ofLocale
  - Properties are added to lib/calendars.properties to identify the 
variants
    by calendar type and to identify the resource containing the 
calendar data.

Webrev:   http://cr.openjdk.java.net/~rriggs/webrev-hijrah-variants/

Javadoc: http://cr.openjdk.java.net/~rriggs/javadoc-hijrah-variants/

Note: there are several related issues to be addressed after this change:
  - The API for Era.date(xxx) does not lend itself to support of calendars
    with multiple variants; Eras do not have any knowledge of a specific 
chronology
  - Performance of initialization at startup
  - Enumerations of Eras

-- 
Thanks, Roger

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