wkb:

Clarified some docstrings.
wkb:

Removed some code duplication in the WKB dumping functions.
wkb:

Implemented `__dump_polygon`.
tests/wkb_test:

Added a 2D test case for `__dump_polygon`.
wkb:

Implemented `__dump_polygon`.
Added empty wkb_detail.md
Update wkb_detail.md

Added fully detailed content for WKB formats.
wkb:

Fixed a python3 compatibility issue in wkb's __dump_polygon method.
Added tox and test artifacts files to .gitignore
wkb, wkt:

Moved the function registry dicts to the bottom of the module. This
makes it a lot easier to find them.
wkb:

Implemented __dump_multipoint.
tests/wkb_test:

Style improvements to text fixtures.
tests/wkb_test:

Added 2D cases for dumping multipoints to WKB.
Abstracted a bunch of common code from wkb

There was a lot of duplication in the WKB dump functions; that's been
factored out with this update.
Added 3d and 4d test casesfor dumping polygon WKB
Added 3d and 4d test cases for dumping multipt WKB
Added 3d/4d test cases for multilinestring->wkt
Fixed a multipoint->wkb bug

The points contained in the multipoint output didn't contain the endian
byte.
Added more test cases to multipoint/mutlilinestr
Implemented WKB __dump_multilinestring

WIP