<commit_before>expose public methods on the BahaiDate class, and update README
  to_s
  long_format

add feature of determining holy days

implement Calendar class providing a hash of months and days for a given year

upload first version to rubygems<commit_msg>Update TODO<commit_after>add feature of determining holy days

implement Calendar class providing a hash of months and days for a given year

upload first version to rubygems
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