Hack around config.db.rm() callback problem.

Callback not being invoked on repeated calls.
Start refactor setup/teardown logic.
Rename db/exists to db/head.
0.1.135
Integrate setup/teardown.
Integrate setup/teardown user functions.
Integrate setup bulk.
Quick test fixtures do not reference config.

Rely on mock, fsutil etc. directly.
0.1.136
Add getArguments() test helper.
Integrate getArguments().
Add app/* tests to qt.
0.1.137