• This module now uses ipaddress on Python 2 rather than ipaddr to
  validate IP addresses before sending them to the web service.
• Added handling of additional error codes that the web service may return.
• PEP 257 documentation fixes.
• Updated documentation to reflect that the accuracy radius is now included
  in City.
• Previously, the source distribution was missing some tests and test
  databases. This has been corrected. Reported by Lumir Balhar.