Improve DatabaseInterface class with instance variables for collections, rename GoogleInfoProvider to BingInfoProvider

	modified:   app/helpers/database_adapter.rb
	modified:   app/helpers/information_interface.rb
	renamed:    app/helpers/information_providers/google_info_provider.rb -> app/helpers/information_providers/bing_info_provider.rb
	modified:   app/helpers/information_providers/database_info_provider.rb
Merge branch 'development' of github.com:pse4/orange-proton into development

Conflicts:
	app/helpers/database_adapter.rb
	app/helpers/information_interface.rb

	modified:   app/helpers/database_adapter.rb
	modified:   app/helpers/information_interface.rb
	modified:   app/helpers/information_providers/mdc_info_provider.rb