Coverage-App: Display JSON results from webscraper

[philion]

When an address is entered that is not served by SCN, the coverage app should display some internet connection options for the entered address.

This issue covers:

• getting the address entered in the coverage app
• sending an HTTP GET request with the address to webscraper
• displaying the JSON response with a popup dialog

[philion]

The code is complete, but still needs to be deployed.