Integrates Marionette layout controllers.

 On branch base_layout_controllers
	modified:   app/assets/javascripts/backbone/apps/channels/channels_app.js.coffee
	modified:   app/assets/javascripts/backbone/apps/channels/list/list_controller.js.coffee
	modified:   app/assets/javascripts/backbone/apps/library/library_app.js.coffee
	modified:   app/assets/javascripts/backbone/apps/library/list/list_controller.js.coffee
	modified:   app/assets/javascripts/backbone/apps/properties/list/list_controller.js.coffee
	modified:   app/assets/javascripts/backbone/apps/properties/properties_app.js.coffee
	modified:   app/assets/javascripts/backbone/apps/schedule/list/list_controller.js.coffee
	modified:   app/assets/javascripts/backbone/apps/schedule/schedule_app.js.coffee
	modified:   app/assets/javascripts/backbone/lib/controllers/application_controller.js.coffee
	modified:   app/assets/javascripts/backbone/lib/controllers/base_layout_controller.js.coffee
	new file:   app/assets/javascripts/backbone/lib/controllers/header_sidebars_layout_controller.js.coffee