DB API was moved to an external project named `atom-db`
0.7.0
DB API was changed to use a `get_or_create` method that can work with caching when restoring objets from the database. The serializer `find_object` was renamed to `get_object_state` and takes the object created by `get_or_create` instead of the object class.
0.6.2
Add option to define order when restoring state by tagging members with a `setstate_order=<number>` to used for sorting. The default is `1000`.
0.6.1
Replace `Bool` fields with `Coerced(bool)` to better support numpy bools.
0.6.0
The `web.core.db` module refactored and made into a package and split to support both nosql and sql.