kill get_child() and get_children() (thanks @jerith)
use message["from_addr"] as the default when ToUserName does not exist in metadata (thanks @jerith)
have NewsMessage subclass WeChatMessage for consistency (thanks @jerith)
inline parse_doc() (thanks @jerith)
fix indentation & add commas (thanks @jerith)
decode json rather than encode dict (thanks @jerith)
remove transport_class (thanks @jerith)
remove access_token class attribute (thanks @jerith)
unused import (thanks @jerith)
missing yield on redis set (thanks @jerith)