Getting the selected movie history UI up and running (when a movie is selected from the history, the movie info pane and map are updated with that movie's locations).

Added two new views to manage the search history <ul> and individual <li> elements. `SearchHistoryItemView` and `SearchHistoryListView` are coupled to handle all UI on this end.

Added a new global event aggregator `Backbone.pubSub` to allow decoupled views to publish and subscribe to events to and from one another.