more docs make_readme.pl updates README make_htmldoc.pl makes Date-Set.html bigger TODO with new API rename print -> _print deprecated "event-empty" t/api2 new api tests uses "copy" and "is_too_complex" implemented in Set::Infinite 0.36 'event', 'during', and 'exclude' requires Set::Infinite 0.36 recurrence 'UNTIL' works as end-boundary