0.07:
* openid.mode=cancel support
* invalidate_handle support
* fix a call to error_page that should've been _error_page
* _secret_of_handle now only takes an assoc_handle, not
also an assoc_type, as an assoc_handle should always
self-imply its type
0.06:
* make rand_chars public
* remove old DSA-based code
* test suite for new DH/HMAC-based code
0.05:
* start implementing the new DH + HMAC-SHA1 spec, instead
of being DSA-based. The DSA code is still working for now,
and it'll do either protocol, but it'll be removed in time.
0.04:
* add "signed_return" method and docs
* require Convert::PEM 0.07, which was always required,
but I forgot its version number before
* add "redirect_for_setup" option on handle_page and docs
0.03:
* stupid push_url_arg bugfix
* more tests
0.02:
* checkid_immediate vs checkid_setup mode (handle_page can return
$type of "setup")
0.01:
* initial release. test suite works. no example app yet.
* requires Crypt::DSA or Crypt::OpenSSL::DSA