Simplebot-writefreely

--------

- use simpler commands and allow to set command prefix using "command_prefix" setting in the plugin scope.
- tweak blog group's name.
- leave blog groups when users logout.

-----

- initial release


.. _Unreleased: https://github.com/simplebot-org/simplebot_writefreely/compare/v1.1.0...HEAD
.. _1.1.0: https://github.com/simplebot-org/simplebot_writefreely/compare/v1.0.0...v1.1.0