1.1.2 (2017-05-16)
-----------------

* Conformance test suite now allows for retries and tests group_send's behaviour with capacity
* valid_channel_names now has a receive parameter

1.1.1 (2017-04-02)
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* Error with sending to multi-process channels with the same message fixed

1.1.0 (2017-04-01)
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* Process-specific channel behaviour has been changed, and the base layer
  and conformance suites updated to match.

1.0.1 (2017-03-19)
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* Improved channel and group name validation
* Test rearrangements and improvements

1.0.0 (2016-04-11)
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* `receive_many` is now `receive`
* In-memory layer deepcopies messages so they cannot be mutated post-send
* Better errors for bad channel/group names
