Z3c.pt

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- Fixed issue where symbol mapping would not be carried through under
a negation (not). [malthe]

- Optimize simple case: if path expression is a single path and path
is 'nothing' or has 'nocall:', just return value as-is, without
going through path_traverse. [sidnei]

- Moved evaluate_path and evaluate_exists over from ``five.pt``, adds
support for global ``path()`` and ``exists()`` functions for use in
``python:`` expressions (LP 317967).

- Added Zope security declaration for the repeat dictionary (tales
iterator). [malthe]

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- The 'not' pragma acts recursively. [malthe]

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- View templates now support argument-passing for alternative context
and request (for compatibility with
``zope.app.pagetemplate``). [malthe]

- Switched off the $-interpolation feature per default; It may be activated
on a per-template basis using ``meta:interpolation='true'``. [seletz]

- Allow more flexibility in overriding the PathTranslator method. [hannosch]

- Removed the forced defaultencoding from the benchmark suite. [hannosch]

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- Split out content provider function call to allow modification
through subclassing. [malthe]

- Added language negotiation. [malthe]

- Simplified template class inheritance. [malthe]

- Added support for the question-mark operator in path-expressions. [malthe]

- Updated expressions to recent API changes. [malthe]

- Added 'exists' and 'not' translators. [malthe]

Bug fixes

- Adjusted the bigtable benchmark test to API changes. [hannosch]

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- Added ``PageTemplate`` and ``PageTemplateFile`` classes. [malthe]

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Bug fixes

- Allow '.' character in content provider expressions.

- Allow '+' character in path-expressions.