Merge branch 'populator_merge' into 'master'

Gemfile

Gemfile.lock

app/models/learning_object.rb

app/models/review.rb

app/models/user.rb

app/services/score_calculator_service.rb

app/services/search_service.rb

app/services/search_service/learning_object.rb

app/services/search_service/model.rb

app/services/search_service/user.rb

config/application.rb

config/database.yml

config/environments/development.rb

config/initializers/eager_load.rb

lib/tasks/db.rake

lib/tasks/score.rake