lazr.restful 1.0.0

Rework ``lazr.restful.testing.webservice.WebServiceCaller`` to send named
POSTs as ``multipart/form-data`` requests. Arguments that are instances of
``io.BufferedIOBase`` are sent as-is rather than being encoded as JSON,
allowing robust use of binary arguments on both Python 2 and 3
(bug 1116954).

Normalize line breaks in text fields marshalled from a request to Unix-style
LF, since ``multipart/form-data`` encoding requires CRLF.

Make ``lazr.restful.testing.webservice.pprint_entry`` and
``lazr.restful.testing.webservice.pprint_collection`` recurse into lists in
order to print text string representations in the Python 3 style.

Require zope.publisher >= 6.0.0 on Python 3.

Make ``lazr.restful.testing.helpers.encode_unicode`` return ``str`` on
Python 3.

Sort fields in HTML views of entries by name.

Don't attempt to JSON-decode ``Bytes`` fields read from a request, since
binary data can't be marshalled via JSON without additional encoding that we
don't do, and ``lazr.restfulclient`` doesn't JSON-encode binary fields.

Declare support for Python 3.