Merge pull request #1596 from noesya/publications-without-hal

...controllers/admin/research/hal/publications_controller.rb

app/controllers/admin/research/publications_controller.rb

...models/communication/website/page/research_publication.rb

app/models/communication/website/page/with_type.rb

app/models/communication/website/permalink/publication.rb

app/models/communication/website/with_connected_objects.rb

app/models/research.rb

app/models/research/hal.rb

app/models/research/hal/author.rb

app/models/research/publication.rb

app/models/university/person/with_research.rb

app/services/citations.rb

app/services/importers/hal.rb

app/views/admin/research/hal/authors/_list.html.erb

app/views/admin/research/hal/authors/show.html.erb

app/views/admin/research/hal/publications/index.html.erb

app/views/admin/research/publications/_form.html.erb

app/views/admin/research/publications/_list.html.erb

app/views/admin/research/publications/edit.html.erb

app/views/admin/research/publications/index.html.erb