Timezonefinder

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* updated the data to `2017a <https://github.com/evansiroky/timezone-boundary-builder/releases/tag/2017a>`__ (tz_world is not being maintained any more)
* the file_converter has been updated to parse the new format of .json files
* the new data is much bigger (based on OSM Data, +40MB). I am sorry for this but its still better than small outdated data!
* in case size and speed matter more you than actuality, you can still check out older versions of timezonefinder(L)
* the new timezone polygons are not limited to the coastlines, but they are including some large parts of the sea. This makes the results of closest_timezone_at() somewhat meaningless (as with timezonefinderL).
* the polygons can not be simplified much more and as a consequence timezonefinderL is not being updated any more.
* simplification functions (used for compiling the data for timezonefinderL) have been deleted from the file_converter
* the readme has been updated to inform about this major change
* some tests have been temporarily disabled (with tzwhere still using a very old version of tz_world, a comparison does not make too much sense atm)

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* added missing package data entries (2.0.0 didn't include all necessary .bin files)

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* ATTENTION: major change!: there is a second version of timezonefinder now: `timezonefinderL <https://github.com/jannikmi/timezonefinderL>`__. There the data has been simplified
for increasing speed reducing data size. Around 56% of the coordinates of the timezone polygons have been deleted there. Around 60% of the polygons (mostly small islands) have been included in the simplified polygons.
For any coordinate on landmass the results should stay the same, but accuracy at the shorelines is lost.
This eradicates the usefulness of closest_timezone_at() and certain_timezone_at() but the main use case for this package (= determining the timezone of a point on landmass) is improved.
In this repo timezonefinder will still be maintained with the detailed (unsimplified) data.
* file_converter.py has been complemented and modified to perform those simplifications
* introduction of new function get_geometry() for querying timezones for their geometric shape
* added shortcuts_unique_id.bin for instantly returning an id if the shortcut corresponding to the coords only contains polygons of one zone
* data is now stored in separate binaries for ease of debugging and readability
* polygons are stored sorted after their timezone id and size
* timezonefinder can now be called directly as a script (experimental with reduced functionality, cf. readme)
* optimisations on point in polygon algorithm
* small simplifications in the helper functions
* clarification of the readme
* clarification of the comments in the code
* referenced the new conda-feedstock in the readme
* referenced the new timezonefinder API/GUI

* clarified usage of the API in the Readme
* all functions are now keyword-args only (to prevent lng lat mix-up errors)
* sorting the polygons to check in the order of how often their zones appear gives a speed bonus

* using little endian encoding now
* introduced test for checking the proper functionality of the helper functions
* wrote tests for proximity algorithms
* improved proximity algorithms: introduced exact_computation, return_distances and force_evaluation functionality (s. Readme or documentation for more info)

* using the newest version (2016d, May 2016) of the tz_world data from http://efele.net/maps/tz/world/
* holes in the polygons which are stored in the tz_world data are now correctly stored and handled
* rewrote the file_converter for storing the holes at the end of the
timezone_data.bin
* added specific test cases for hole handling
* made some optimizations in the algorithms