Changes 5.0.0:
* Support for Berkeley DB 5.0.
* Drop support for Python 3.0.
* Now you can use TMPDIR env variable to override default
  test directory ("/tmp").
* Versioning of C API. If you use the code from C, please
  check the bsddb_api->api_version number against
  PYBSDDB_API_VERSION macro.
* In C code, the bsddb_api->dbsequence_type component is always available,
  even if the Berkeley DB version used doesn't support sequences. In that
  case, the component will be NULL.
* In C code, "DBSequenceObject_Check()" macro always exists, even if the
  Berkeley DB version used doesn't suport sequences. In that case, the test
  macro always returns "false".
* For a long time, the API has been accesible via C using "_bsddb.api" or
  "_pybsddb.api". If you are using Python >=2.7, you acquire access to that
  API via the new Capsule protocol (see "bsddb.h").  If you use the C API and
  upgrade to Python 2.7 and up, you must update the access code (see
  "bsddb.h"). The Capsule protocol is not supported in Python 3.0, but
  pybsddb 5.0.x doesn't support Python 3.0 anymore.
* Capsule support was buggy. The string passed in to PyCapsule_New() must
  outlive the capsule.
* Solve an "Overflow" warning in the testsuite running under python 2.3.
* When doing a complete full-matrix test, any warning will be considered
  an error.

(adam)