Version history updates

docs/history.rst

 Version History
 ---------------
+ - 0.27.0 - released *2016-05-11*
+  - Added new :class:`~rabbitpy.simple.SimpleChannel` class
+  - Exception formatting changes
+  - Thread locking optimizations
+  - Connection shutdown cleanup
+  - :class:`~rabbitpy.message.Message` now assigns a UTC timestamp instead of local timestamp to the AMQP message property if requested (#94)
+  - Unquote username and password in URI (#93) - `sunbit <https://github.com/sunbit>`_
+  - Connections now allow for a configurable timeout (#84, #85) - `vmarkovtsev <https://github.com/vmarkovtsev>`_
+  - Bugfix for :meth:`~rabbitpy.amqp.AMQP.basic_publish` (#92) - `canardleteer  <https://github.com/canardleteer >`_
+  - Added ``args`` property to :class:`~rabbitpy.connection.Connection` (#88) - `vmarkovtsev <https://github.com/vmarkovtsev>`_
+  - Fix locale in connection setup from causing hanging (#87) - `vmarkovtsev <https://github.com/vmarkovtsev>`_
+  - Fix heartbeat behavior (#69, #70, #74)
+  - Cancel consuming in case of exceptions (#68) -  - `kmelnikov <https://github.com/kmelnikov>`_
+  - Documentation correction (#79) - `jonahbull <https://github.com/jonahbull>`_
  - 0.26.2 - released *2015-03-17*
   - Fix behavior for Basic.Return frames sent from RabbitMQ
   - Pin pamqp 1.6.1 fixing an issue with max-channels