Merge branch 'master' into fixing-statistics

Gemfile

app/builders/learning_object_builder.rb

app/controllers/management/users_controller.rb

app/controllers/welcome_controller.rb

app/models/collection.rb

app/models/learning_object.rb

app/models/subject.rb

app/repositories/orient_db/base.rb

app/repositories/orient_db/institution_repository.rb

app/repositories/orient_db/learning_object_repository.rb

app/repositories/orient_db/main_page_repository.rb

app/repositories/orient_db/subject_repository.rb

app/repositories/repositories_proxy.rb

app/views/management/users/admins.html.erb

app/views/management/users/curators.html.erb

app/views/shared/application/_header.html.erb

app/views/welcome/index.html.erb

config/dspace.yml

config/initializers/repositories/repositories.rb

lib/log/database_logger.rb