Status doesn't properly load extended tweets from streaming APIs #506

Summary

The Status.NewFromJsonDict method doesn't properly load extended tweets with an extended_tweet payload, which is how the streaming APIs provide extended tweets

Steps to Reproduce

1. Load a JSON dict of an extended tweet in Twitter's "Compatibility with additional extended_tweet in payload" mode. You can find a sample here, or use GetStreamSample() and check for tweets with truncated = True.
2. Use Status.NewFromJsonDict to convert the JSON dict to a Status.
3. The status will just have a text property, without a full_text, even when the API instance has tweet_mode set to extended. Other extended entities are also not available.

Workaround

By copying the keys from the JSON's extended_tweet object to the root object, NewFromJsonDict properly parses the tweets as an extended tweet, with full_text available.

Example:

# Where json_dict is a dictionary parsed from the JSON of a tweet in this mode
if json_dict.has_key('extended_tweet'):
    for key, value in json_dict['extended_tweet'].items():
        json_dict[key] = value
converted_tweet = Status.NewFromJsonDict(json_dict)
# converted_tweet.full_text will be populated and not truncated