Returns location, (latitude, longitude) from json feed.

def _parse_json(self, json, exactly_one=True):
        '''Returns location, (latitude, longitude) from json feed.'''
        features = json['features']
        if features == []:
            return None

        def parse_feature(feature):
            location = feature['place_name']
            place = feature['text']
            longitude = feature['geometry']['coordinates'][0]
            latitude = feature['geometry']['coordinates'][1]
            return Location(location, (latitude, longitude), place)
        if exactly_one:
            return parse_feature(features[0])
        else:
            return [parse_feature(feature) for feature in features]