* Bot API 3.3
* simpler helper methods (accept only custom names now)
attempt to fix circular import (not sure if its the correct way tho)
added helper methods into User object
* fix User objects in tests to contain is_bot required value
* fix User objects in tests to contain is_bot required value
* delete extra line that caused flake8 error
* fix swapped arguments
Required fixes:
- CallbackQuery is now comparable.
- Message.effective_attachment, Message.photo,
Message.new_chat_members, Message.new_chat_photo &
Game.text_entitties semantic fixes - when they are not defined,
return an empty list.
- Docstring fix to Update class.
