Products.simpleattachment

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- Added ImageAttachment and FileAttachment blob content migrators and
migration view (simple-attachment-migration)
[petschki]

- Removed transform cache from file attachment, but leave cache invalidation
in place. Reducing the size of the Data.fs is important.
[hannosch]

- Removed the `SimpleAttachment` spelling of the GenericSetup profile. Use
`profile-Products.SimpleAttachment:default` instead.
[hannosch]

- Removed the CachingFileField and relevant FileAttachments patches. We do not
want to store annotations any longer.
[ggozad]

- Use blob fields for FileAttachment and ImageAttachment
[ggozad]

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- Added Dutch translations [jladage]

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- Fixed images and attachments in widgetmanagers were displayed in random
order because default catalog query (implemented in 3.4) does not sort on
'getObjPositionInParent' by default. [saily]

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- Fixed the setuphandler step dependency.
[rossp]

- removed tabindex for plone 4 compatibility because of
http://dev.plone.org/plone/changeset/36610/Plone/trunk/Products/CMFPlone/utils.py
[hpeteragitator]

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- readded old profile name for backward compatibility.
Both profiles exist now. Please use default.
[do3cc]

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- fix attachments not being shown from migrated sites since
getFolderContents didn't work correctly.
[vangheem]

- change profile name to default like normal products should
[vangheem]