merge fixing-statistics

app/assets/javascripts/application/learning_objects.coffee

app/assets/javascripts/management/Chart.js

app/assets/javascripts/management/carousel.coffee

app/controllers/management/statistics_controller.rb

app/controllers/users_controller.rb

app/models/learning_object.rb

app/repositories/orient_db/base.rb

app/repositories/orient_db/learning_object_repository.rb

app/views/collections/_create.html.erb

app/views/collections/_form.html.erb

app/views/learning_objects/_add_to_collection_btn.html.erb

app/views/learning_objects/_learning_object_horizontal.erb

app/views/management/carousels/edit.html.erb

app/views/management/carousels/index.html.erb

app/views/management/carousels/new.html.erb

app/views/management/statistics/accesses.html.erb

app/views/management/statistics/collections.html.erb

app/views/management/statistics/downloads.html.erb

app/views/management/statistics/index.html.erb

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