More basic implementation of LiveInfoProvider, now returns more fitting data and considers user input

Still some bugs though: No special fields are returned for languages other than 'en'

	modified:   app/api/api.rb
	modified:   app/helpers/information_interface.rb
	modified:   app/helpers/information_providers/live_info_provider.rb
	modified:   app/models/mongo_models/field.rb
	modified:   app/models/mongo_models/icd_entry.rb