* Python 3 support and significant code cleanup. ( Zack Weinberg )
* The methods `name_by_addr`, `name_by_addr_v6`, `name_by_name`, and
  `name_by_name_v6` were added for ISP, Org, and ASNum lookups.
  ( Carlos Rodrigues )
* Portability fixes.
* Expose `GEOIP_MMAP_CACHE` from the C library. ( George Macon )
* Unit tests were added.