Event listener not working. Committing for now.

Fix the event listener so that a new view can be created upon
'get directions' link
Get event listener inside of the infoWindow

* It's not possible to trigger an event for the 'show directions' link
  when it is clicked in the info window.
* This involved creating a new view for the infoWindow content, which
  adds the link to the div of the info window. Since the parent element
  is created at the time of the infowindowview creation, the 'showDirections'
  function inside of the pin view can be triggered.

Next steps:
*  Have the showDirections function actually create a directions list
Merge pull request #12 from mknudsen01/add-listener-to-pin-link

Add listener to pin link