Create sphinx documentation (and deploy on readthedocs)

[nigelbabu]

Document all existing features on read the docs.

[domoritz]

I would be interested in learning more about the arguments that can be passed to dataconverter. Is there any reason why I have to pass a dictionary instead of just python arguments?

You could have something like dataconverter(file, type=None, target=None, header_type=None). You could even convert arbitrary arguments to a dict, if you prefer.

[rufuspollock]

IMO: just document in the README.rst and in docstrings. sphinx docs can come later ;-)