Risclog-sqlalchemy

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- Add Database methods for setting up a database utility and emptying tables.

- Add testing layer that sets up a database utility (requires plone.testing).

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- Add helper to provide transparent json encoding of sqlalchemy mapped objects,
dates, datetimes and decimals. (39)

- Add `create_defaults` class method on base model which can be used to create
test data into the database.

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- Repair db setup for reflected and unreflected objects.

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- Add unreflected Object model next to the reflected Object model.

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initial release