Marshmallow

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Features:

- Allow ``only`` and ``exclude`` parameters to take nested fields, using dot-delimited syntax (e.g. ``only=['blog.author.email']``) (:issue:`402`). Thanks :user:`Tim-Erwin` and :user:`deckar01` for the discussion and implementation.

Support:

- Update tasks.py for compatibility with invoke>=0.13.0. Thanks :user:`deckar01`.

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- Make ``field.parent`` and ``field.name`` accessible to ``on_bind_field`` (:issue:`449`). Thanks :user:`immerrr`.

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No code changes in this release. This is a reupload in order to distribute an sdist for the last hotfix release. See :issue:`443`.

Support:

- Update license entry in setup.py to fix RPM distributions (:issue:`433`). Thanks :user:`rrajaravi` for reporting.

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Bug fixes:

- Only add Schemas to class registry if a class name is provided. This allows Schemas to be
constructed dynamically using the ``type`` constructor without getting added to the class registry (which is useful for saving memory).

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Features:

- Make context available to ``Nested`` field's ``on_bind_field`` method (:issue:`408`). Thanks :user:`immerrr` for the PR.
- Pass through user ``ValidationError`` kwargs (:issue:`418`). Thanks :user:`russelldavies` for helping implement this.

Other changes:

- Remove unused attributes ``root``, ``parent``, and ``name`` from ``SchemaABC`` (:issue:`410`). Thanks :user:`Tim-Erwin` for the PR.

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Bug fixes:

- Respect ``load_from`` when reporting errors for nested required fields (:issue:`414`). Thanks :user:`yumike`.