ChangeLog:
Version 0.7.1 (2014-06-28) *100th Anniversary of the Assassination of Franz Ferdinand*
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#### Package changes
* Add `IsList` instance for GHC >= 7.8 ([Icelandjack](https://github.com/Icelandjack))
packaged for wip by pho.
Difference lists are a list-like type supporting O(1) append. This is
particularly useful for efficient logging and pretty printing (e.g. with
the Writer monad), where list append quickly becomes too expensive.