PostcodeProcessor.getLatLongFromPostcode function does not return latitude and longitude, it

[wfastrononomer]

This function returns a dictionary of a dictionary, so PostcodeProcessor.getLatLongFromPostcode()['result']['latitude'] gives you the latitude, and similarly for longitude.

We should do a separate function that processes to get this dictionary if it is used elsewhere and then a function that returns latitude and longitude as a tuple, or namedtuple

[abeardwalks]

I've updated the method to be named getLocationFromPostcode, and it now returns a tuple.