Plone-supermodel

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- Avoid trying to process XML comments within field values.
[davisagli]

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- Allow XML comments in field definitions.
[gweis]

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- Nothing changed yet.

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- Use lxml instead of elementtree.
[davisagli]

- Avoid a test dependency on zope.app.testing.
[davisagli]

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- Fix a packaging error.
[esteele]

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- Support i18n:domain and i18n:translate for internationalization.
[davisagli]

- When an error is encountered while parsing a supermodel, the exception
now provides the filename, line number, and source of the part of the
model that was being processed. Inclusion of the line number and source
requires lxml.
[davisagli]

- Add model.Schema and directives to avoid grok dependency.
[elro]