Added some crude dependency injection to the main HttpGet for easier mocking of responses from service.
Attempted to add an overload for Assert for Nullable types.
Added public comment to eliminate XML comment missing nag.
modified ApiUri to default to HTTPS with easy ability to use the HTTP if so desired.
removed LatitudeLongitude property in favor of a single property Address.  Pass a LatLng object into Address to perform reverse geocoding.
modified Sensor property to be a bool?.
Fixed up tests to reflect different interface.
removed GetBoundsStr from accessor due to its missing.
added EnsureSensor to ToUri() and test to ensure throwing InvalidOperation when you haven't set Sensor property.