Feature/map search

This implements the search box on the map page.  It will do autocomplete on the field for building IDs.  If the entered text is numeric only, it will search properties by building ID; otherwise, it will geocode an address.  Either way, it will pan to the location found and open a pop-up.  A message displays below the search box to say if it's currently performing a search, or if no results were found for the search.
It may be worth using the currentYear value from CartoConfig.tables here (and elsewhere). This map is only for the current year, but I can foresee getting a new set of data in a year or two down the line, and it would be great if we only needed to switch the value of currentYear in the config to bring it up to date.