look up and display Hartford School Zone by address

Added two javascript functions to `maps_lib.js` - one for querying the polygon table and one for displaying the results of that lookup.

![screen shot 2014-10-21 at 12 05 47 pm](https://cloud.githubusercontent.com/assets/919583/4723047/8fc43c64-5944-11e4-8fa7-b3e500de3e19.png)

Typically, I like to make use of the `query()` function in `maps_lib.js` but in this case, the query was too specific, in that it was querying a secondary table and only cared about the address part of the search (not the values from checkboxes or dropdowns)

@JackDougherty let me know if this works for you!