Imio.directory.core

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- Add multilingual features: New fields, vocabularies translations, restapi serializer
[laulaz]

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- Fix translation
[boulch]

- WEB-3762 : Reorder contact fields to encourage good completion + add some fields descriptions
[boulch]

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- WEB-3770 : Force include_items in serializer to True to get files and pictures included in contact
[boulch]

- Add eea.faceted.navigable behavior on Entity type
[laulaz]

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- WEB-3726 : Add subjects (keyword) in SearchableText
[boulch]

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- Update contact_category taxonomy data to reflect production site data
[laulaz]

- [WEBMIGP5-36] Add new vocabulary terms in imio.directory.vocabulary.SiteTypes (Instagram, Pinterest, Youtube)
[boulch]

- It's not allowed to put Images or Files in imio.directory.Entity
[boulch]

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- Use unique urls for images scales to ease caching
[boulch]

- Use common.interfaces.ILocalManagerAware to mark a locally manageable content
[boulch]