lukashian 1.0.0

The Lukashian Calendar for Dart: a simple, accurate, universal calendar mechanism for Earth, Mars and beyond.

1.0.0

• Initial release of the Dart implementation of The Lukashian Calendar.
• Core types: Year, Day, Instant, Formatter, DayFormat, LukashianException, CalendarObject.
• MillisecondStore and MillisecondStoreData with pluggable MillisecondStoreDataProviders.
• Standard Earth and Mars HTTP providers (lukashian.org), plus generic HTTP and file providers.
• Calendar keys: earth, earthHttpLukashianOrg, mars, marsHttpLukashianOrg. Computed Earth/Mars providers are stubs; use the HTTP or file providers to load official data.
• Differences from the Java reference are documented in README.md under "Deviations from the Java reference implementation".