Use body instead of query_params for PUT and POST requests

[wolph]

RIght now some (all?) of the PUT and POSt requests use query parameters to send the values, with large values that can cause errors since the url becomes too long. I propose changing them to json bodies instead.

For example, in the case of the update_card method in card.py:

def update_card(self, query_params=None):
    '''
    Update information for this card. Returns a new Card object.
    '''
    card_json = self.fetch_json(
        uri_path=self.base_uri,
        http_method='PUT',
        body=json.dumps(query_params),
    )
    return self.create_card(card_json)

Works fine except that it accepts much more data :)

[its-rigs]

Yeah good point. Been a while since I did any major work on this. My plan is to start separating this out a bit more, starting with the http requests, so I'll abstract this out then.