* Adding support for IP identifiers according to https://tools.ietf.org/html/draft-ietf-acme-ip-05.
* Add changelog.
* Make sure that the authorizations return value is unchanged for CSRs with DNS-only SANs.
* Remove unneeded import.
* type -> identifier_type
* Python 2.6 compatibility.
* Fix unit tests.
* Add IP address normalization.
* Extend tests.
* Move data into fixtures.
* Adjust BOTMETA.
