Redturtle-lookup

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- New view that allows to install/upgrade products [cekk]

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Plone 4 compatible version

* z3c.autoinclude support [keul]
* egg cleanup [keul]
* fixed permission for ``lookup.sites`` [keul]
* display a warning icon if a site needs to be upgraded [keul]
* ``lookup.sites`` now properly displayed [keul]
* i18n support [keul]

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* fix https://code.redturtle.it/pm/p/er--portale/ticket/271 [mauro]

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* sites [mauro]
* anonymous users [mauro]
* zelenium tests [mauro]
* jquery accordion [mauro]

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* Initial release