Collective.classifieds

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* allow normal categories to have images too
* url validation added to url field
* code cleanup

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* fixed permission bug
* release candidate one

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* fixed broken egg

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* collective.classifieds issue 7 fixed
* code cleanup, removed obsolete imports and general cleanup
* changed the way catalog indexes get created
* added external url to classified
* changed the way the deletion link works

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* proper integration test added
* changed testbase
* update version information
* tested on plone 3.3 and plone 4

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* changed the validator to work in plone 3 and 4
[maartenkling]
* upgr to work in plone 4
[maartenkling]
* added global defines when needed to templates
[maartenkling]
* changes folderish type definition of classifiedsCategory ( plone 4 )
[maartenkling]
* changed the implements for validator ( plone 4 )
[maartenkling]

* Fixed some issues regarding indexing of image urls, template calls
* Added view tab to Classified