Note fix.
Coverage for r.w._compat.must_encode.
Janitorial (imports, docstring formatting).
Note rationale for optional CONTENT_TYPE vs. required REQUEST_METHOD.
Prep 2.1 release.
Denote explicit support for PyPy, Python 3.3.
Denote ReST.
Ignore derived.
Add 'docs' to tox builds.
Build / test the docs under tox by default.
Parse INI-file configuration using SafeConfigParser.

Allows escaping the ``'%'`` so that e.g. a query template using for a DB-API
connection using ``pyformat`` preserves the template.
Prep 2.2 release.
Catch up to latest release.
Change format of Expiry headers to follow RFC 2616 (http://tools.ietf.org/html/rfc2616#section-3.3.1).