- Added support for ``Voice`` object and ``sendVoice`` method - Due backward compatibility performer or/and title will be required for ``sendAudio`` - Fixed JSON serialization when forwarded message
**2015-08-15**
2.6.1
- Fixed parsing image header issue on < Python 2.7.3
**2015-08-14**
2.6.0
- Depreciation of ``require_authentication`` and ``clearCredentials`` methods - Giving ``AUTHORS`` the proper credits for their contribution for this project - ``Message.date`` and ``Message.forward_date`` are now ``datetime`` objects
**2015-08-12**
2.5.3
- ``telegram.Bot`` now supports to be unpickled
**2015-08-11**
2.5.2
- New changes from Telegram Bot API have been applied - ``telegram.Bot`` now supports to be pickled - Return empty ``str`` instead ``None`` when ``message.text`` is empty