Products.validation

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- Accept base domain names longer than 6 chars like .brussels
[gotcha]

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- No changes.

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- Added missing zope.i18n(messageid) dependencies.
[hannosch]

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- Cleaned up package metadata.
[hannosch]

- Declare test dependencies in an extra and fixed deprecation warnings
for use of Globals.
[hannosch]

- Removed useless assert statements. Assert is not a function.
[hannosch]

- Purge old zope2 Interface interfaces for Zope 2.12 compatibility.
Consider branching before this commit if release required before Plone 4.
[elro]

- Cleaned up lots of old BBB code.
[hannosch]

- Email validator did not allow apostrophe in the local part of an email
address. This closes http://dev.plone.org/plone/ticket/7947.
[hannosch]

- Relaxed EmptyValidator requirement that REQUEST has a form.
This closes http://dev.plone.org/plone/ticket/7346.
[bostrick, hannosch]

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- Cut the validation short when there is only one validator and this
validator is 'sufficient', which means it does not need to validate.
[maurits]

- Removed an unnecessary call on Zope startup to the test method in chain.py.
[maurits]

- Fix: ValidatorError was used (at least theoretically) in chain.py
but not imported.
[maurits]

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- Fixed the translated error messages to use Message objects correctly. The
mapping attribute of Messages can only contain Unicode. Added a helper
method `safe_unicode` to convert non-unicode string data into Unicode.
[hannosch]

- Fixed a SyntaxError in RangeValidator.
[hannosch]