Option to use in-memory sqlite database if no audit trail is needed

[jeffmax]

The code requires the sqlite db to properly consistently replace values, but an in-memory database could be used when the user does not want to record this data.

[blakedewey]

This should be pretty easy. You could just set the default for audit file to be ':memory:' instead of 'identity.db'. sqlite3 uses this to create an in-memory database.