Ftw.file

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- Add umlaut support for MSIE file download [busykoala]

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- Protect the edit form tab (schemata) for the expiration date and effective date
with a separate permission. [mbaechtold]

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- Drop support for Plone 4.2. [mbaechtold]

- Prevent exception upon HEAD requests to the download view of a file. [mbaechtold]

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- A new registry record can be used to prevent redirects to the download
view of the file. [mbaechtold]

- Rewrite download redirection tests using ftw.testbrowser, drop dependency on
ftw.testing[splinter]. [lgraf]

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- Added option to download file with inline content-disposition header. [lknoepfel]

- A new option on the file can be used to protect a file. Protected files
cannot be deleted by anyone until the option is unchecked. [mbaechtold]

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- Record ftw.activity event when file downloaded. [jone]

- Eliminate bad security declarations through interface. [jone]

- Simplify schema inheritance. [jone]

- Fix security declarations for getOriginFilename, is_image and getField. [jone]