Collective.documentgenerator

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- Added CSV file support.
[odelaere]
- Reworked icons to use svg instead of png and have a more consistent set.
[odelaere]
- Add generated title parameter for PersistentDocumentGenerationView.
[jjaumotte]

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- Prevent "AttributeError" by not render actionpanel's external edit when there is another pod template to use
[fngaha]
- Use the same default values between controlpanel schema and registry records.
[odelaere]

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- Updated file_representation to be compliant with zopeedit < 1.0 (current windows exe) and zopeedit >= 1.0.
[sgeulette]
- Fixed bug when rendering an empty RichTextATFieldRenderer.
[odelaere]
- Pass `kwargs` given to `DocumentGenerationView.__call__`,
to submethods `generate_and_download_doc`, `_generate_doc`,
`_recursive_generate_doc` then `_render_document` so it is possible to pass
`raiseOnError=False` parameter to `_render_document`.
[gbastien]

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- In `AT` renderer and helper, use field accessor instead `get()` method
to get the stored value.
[gbastien]

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- Fix `RuntimeError: set changed size during iteration` error in get_children_pod_template() method.
[sdelcourt]

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- Improve integration of stream parameter for Appy, this allow to explicitly set the value to `False`.
The default value remain `auto`.
[mpeeters]
- Added Transifex.net service integration to manage the translation process.
[macagua]
- Added Spanish translation.
[macagua]
- Updated the i18n support.
[macagua]