implement (and fix) local timezone
isodatetime: implement feedback
Add method to set 360 day calendar
Cover all calculations.
add __version__ information
Merge pull request #38 from benfitzpatrick/add_version

add `__version__` information
Update CONTRIBUTING.md
Merge pull request #35 from benfitzpatrick/set_timepoint_to_local_timezone

Implement (and fix) local timezone for TimePoint
Update CONTRIBUTING.md
Add method for swapping back to gregorian calendar.
Add tests for 360 day calendar.
Add docstrings.
Merge pull request #40 from arjclark/set_360_cal

Set a 360 day calendar