Log Message:
Update to 0.9.5.1

Changes:

* libpreludedb-0.9.5.1:

- Correctly read database schema version.

* libpreludedb-0.9.5:

- Fix important memory leak in Python bindings, Prewikka should end-up
  consuming way less memory than it used to.

- Fix PostgreSQL plugin compilation problem.

- Fix for preludedb-admin --count handling when --offset was used.

- Provide more information in preludedb-admin error message.

- Various cleanup.