fix next_point for single-repetition recurrence
fix prev_point for single repetition recurrences
add more recurrence tests
implement subset of strftime/strptime POSIX standard
separate out timezone functions, custom parsing
Merge pull request #28 from benfitzpatrick/fix-next-recurrence-null-interval

Fix get next point for single-repetition recurrences
unix epoch parse/dump, timezone dump casting, dump-as-parsed switch
implement review feedback
update
Merge pull request #29 from benfitzpatrick/strftime_strptime

Implement subset of strftime/strptime POSIX standard
Merge branch 'master' of github.com:metomi/isodatetime into strftime_strptime
Merge pull request #30 from benfitzpatrick/strftime_strptime

Dumper enhancements
strptime/strftime: remove %y support.

This has been removed since the POSIX standard
requires guessing the century from a %y strptime,
and also states that the method of guessing may
change in future standards. This is too unstable
to use.
Merge pull request #31 from benfitzpatrick/strptime.remove-percent-y-token

strptime/strftime: remove %y support.
fix dumping week date timepoint year
custom dump week fix: implement feedback
Merge pull request #32 from benfitzpatrick/custom-dump-calendar-from-week

Fix dumping week date timepoint year
Add automatic strftime dumping
Merge pull request #36 from benfitzpatrick/dumper-auto-strftime

Add automatic strftime dumping