Class: AppStoriesDirective

The <app-stories>...<app-stories> directive. Supports the
following attributes:

• stories '=' - an array of stories objects, e.g. from a stories
  json file - see tellStoryHandler(...) for a list of properties
  a story supports


• story '=' - the currently selected story


• highlights '=' - the highlights object containing the state of
  interaction context the user uses the visualization environment
  in right now


• homeurl '@' - supply an URL here if you want the user to have the
  option to return to an overview page from the stories


• metricsselector '&' - a callback to invoke with a value of
  metric ids when a story demands a specific sets of metrics to be
  shown.


• explore '@' - supply an URL here if you want the user to have the
  option to go to a more exploratory visualization from the story
  box