Print exception information and do trace. Remove unittest dependencies, use bb.utils.testing.unittest instead.
Add teardown() method for TestCase class. Move some functionallity from original unittest.
Move get_active_application() to bb.app package. Add factories for Application and Mapping classes. Fix problem with registration. Do we need to move application api to separate package, e.g. bb.app.api?
Fix issue #43 with mapping registration. Test registration not with an active instance, but with a new one. Test api around active application for carefully.