Start of Channels panel view.

 On branch marionette_integration

	modified:   app/assets/javascripts/backbone/apps/properties/channels/channels_controller.js.coffee
	modified:   app/assets/javascripts/backbone/apps/properties/channels/channels_view.js.coffee
	new file:   app/assets/javascripts/backbone/apps/properties/channels/templates/empty.jst.hbs
	new file:   app/assets/javascripts/backbone/apps/properties/channels/templates/list.jst.hbs
	new file:   app/assets/javascripts/backbone/apps/properties/channels/templates/member.jst.hbs
	modified:   app/assets/javascripts/backbone/apps/properties/channels/templates/show.jst.hbs
	modified:   app/assets/javascripts/backbone/apps/properties/properties_app.js.coffee
	new file:   app/assets/javascripts/backbone/entities/_base/collection_manager.js.coffee
	new file:   app/assets/javascripts/backbone/entities/channel.js.coffee
	modified:   app/assets/javascripts/backbone/entities/publishing.js.coffee