a modal for ribcage-ui
npm install ribcage-modal
var Modal = require('ribcage-modal')
var modal = new Modal({view: myView})
modal.setContent(myOtherView)
modal.addButton({label: 'done', action: function (){} })
modal.clearButtons()
modal.view.trigger('showBack') // shows a back button instead of a close button
modal.view.trigger('hideBack') // hides the back button and shows the close button
modal.close()