Comment 3 for bug 94986

I've updated the branch to a point where it could be considered for merge.

A few notes on the implementation:

1. The branch does not include any logic to retry connections, instead opting to make it easy to detect a disconnection through the DisconnectionError exception. It is expected that an app would retry DisconnectionErrors in the same way they'd retry IntegrityErrors.

2. It only includes a disconnection handling for Postgres, but it should be trivial to support other backends. The tests seem to pass with the psycopg2 in Gutsy, but I still run foul of the bug mentioned in the previous comment when testing interactively.

3. It could probably do with some mock object tests for the db independent portion of the code -- currently it only has highlevel disconnection tests.