Collective-pdftransform

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- Nothing changed yet.

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- Code cleanup.
[maurits]

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- Do not explicitly require collective.pdfpeek 1.2, but make that a
minimum.
[maurits]

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- Patched pdfpeek to use the default 1.2 release. [vincent]

- Allow setting PDF resolution in update_form. [vincent]

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- Bugfix in utils/is_transformable_pdf. [vincent]

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- added translations for french and dutch. [vincent]

- updated the validator to return an error if the PDF file can not be
transformed. [vincent]

- added is_transformable_pdf in utils, tells if the PDF file uploaded
can be transformed with pdf_to_image. [vincent]

- added validator called 'isValidImageOrPDF' that checks that the
submitted if is a PDF or an image (except BMP images as it can cause
problems). [vincent]

- added update_form in utils, that can be used in
the post_validate method of your Archetype objects. [vincent]

- Added transform to the portal_transform. [vincent]