Walkscore

Adds a service to pull back the Walkscore API Feed when given some location / address variables, that relies upon the G5-Hub for those variables.   The Controller gets some params that originate from the widget, makes a call to the G5 Hub API with those params, pulls back some location info from the G5-Hub, the constructs a URL for the Walkscore API, which returns a JSON string for use in the widget.