1.3
===

Add ``postgresql_instance`` fixture.

1.2
===

Added some logging info to initdb, start, stop.

Substantial improvements for test suite.

1.1
===

Allow the POSTGRESQL_HOME environment variable to stipulate where
the Postgres binaries must be found, overriding heuristic search.

1.0
===

Initial release, using models from yg.test 4.1.
