Niteoweb.ipn.core

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- Prefix log entries with current user's username.
[zupo]

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- The ``product_id`` parameter is not always needed for in ``disable_member``
so don't make it required.
[zupo]

- The validity view now supports *dry-run* mode.
[zupo]

- The validity view now prints processing results to the browser.
[zupo]

- Better ``valid_to`` default value.
[zupo]

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- Use ``ipn_`` as a prefix for product group IDs.
[zupo]

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- Initial release.
[zupo]