provide automatic documentation

[brando90]

• "sphinx" with the "autodoc" plugin to turn my docstrings into nice documentation example http://maps.readthedocs.io/en/latest/api.html is autogenerated from the docstrings in my code you can even click “source” on the side to see the source code that includes the relevant docstring e.g.: http://maps.readthedocs.io/en/latest/_modules/maps/frozenmap.html#FrozenMap