Authres

+ Add support for RFC 7601 use of SMTP auth with the mailfrom property
* Updated README and docstring reference to refer to RFC 7601

--- 0.702 (2015-01-25 19:01 -0500)
* Adjust examples and add discussion in the README about reporting SPF HELO
and Mail From results correctly

--- 0.701 (2014-06-25 06:25 -0400)
* Remove unintended artifacts from tarball

--- 0.602 (2013-07-29 18:39)

* Tolerate empty <pvalue>, such as in "smtp.mailfrom=". RFC 5451, via
RFC 2045, requires at least one character, but it seems more useful and
only a minor violation of the spec to parse out an empty string rather
than raising an exception.

--- 0.601 (2013-04-27 04:23))

* When stringifying RFC 5451 property values (pvalue), format them as quoted-
strings if they contain spaces or special characters (and are not e-mail
addresses). E.g., IPv6 addresses in policy.iprev properties must be
double-quoted.
* Fix broken references to quoted_string variable in authres.core.
AuthenticationResultsHeader._parse_pvalue method. (Closes: LP #1165978)
* Fix erroneous reference to ArgumentError exception to refer to ValueError
instead. When does the Ruby compatiblity layer for Python come out?
* Added additional tests/examples in authres/tests

* Make authres.dkim_b.DKIMAuthenticationResult inherit from authres.core.
DKIMAuthenticationResult, not authres.core.AuthenticationResult.