Timezonefinder

------------------

* fixing typo in requirements.txt
* updated publishing routine: reminder to include all direct dependencies and to compile the requirements.txt with python 2 (pip-tools)

------------------

* ATTENTION: the package `kwargs_only <https://github.com/adamchainz/kwargs-only>`__ is now required! This functionality has previously been implemented by the author directly within this package, but some code features got deprecated.
* updated build/testing/publishing routine
* fixing issue 61 (six dependency not listed in setup.py)
* no more default arguments for timezone_at() and certain_timezone_at()
* no more comparison to (py-)tzwhere in the tests (test_it.py)
* updated requirements.txt (removed tzwhere and dependencies)
* prepared helpers_test.py for also testing helpers_numba.py
* exchanged deprecated inspect.getargspec() into .getfullargspec() in functional.py

------------------

* fixing minor issue 58 (readme not rendering in pyPI)

------------------

* ATTENTION: the package six is now required! (was necessary because of the new testing routine. improves compatibility standards)
* updated build/testing/publishing routine
* updated the data to `2018d <https://github.com/evansiroky/timezone-boundary-builder/releases/tag/2018d>`__
* fixing minor issue 52 (shortcuts being out of bounds for extreme coordinate values)
* the list of polygon ids in each shortcut is sorted after freq. of appearance of their zone id.
this is critical for ruling out zones faster (as soon as just polygons of one zone are left this zone can be returned)
* using argparse package now for parsing the command line arguments
* added option of choosing between functions timezone_at() and certain_timezone_at() on the command line with flag -f
* the timezone names are now being stored in a readable JSON file
* adjusted the main test cases
* corrections and clarifications in the readme and code comments

------------------

* bugfix: possibly uninitialized variable in closest_timezone_at()

------------------

* updated the data to `2017c <https://github.com/evansiroky/timezone-boundary-builder/releases/tag/2017c>`__
* minor improvements in code style and readme
* include publishing routine script