Collective.easyform

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- Spanish translation.
[erral]

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New features:

- New method in api: filter_widgets. If a isn't selected, mailer action don't try
to render its widget. This is useful when we want to avoid to show some widgets
like recaptcha, that could breaks if it's in the wrong context.
[cekk]

Bug fixes:

- changed the permission of saveddata action from "Manage portal" to "Modify portal content" so "action" and "view" have the same permission
[eikichi18]

- Fix to thanks page regression introduced in 2.0.0b4
[instification]

- Fix e-mail attachments with non ASCII chars
[tomgross]

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- Add option to attach form data in XML format to email
[nngu6036]

- add some mailer adapter documentation, add required package version pins
[tkimnguyen]

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- Bug fixes:

- update some old documentation, add documentation for get_save_data_adapters view
[tkimnguyen]


New features:

- add get_save_data_adapters view
[tkimnguyen]

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Bug fixes:

- Fix display of items in fieldset on thanks page
[tomgross]

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New features:

- Add support for hidden fields
[tomgross]


Bug fixes:

- Fix filtering regression introduced with 2.0.0b3
[tomgross]