anchor/retcon — pull request #74 by thsutton (2014-10-17 03:46:30+00:00)
Title: Remove incomplete code from MergePolicy module

Quite a lot of the code in Retcon.MergePolicy was related to a
designed but not yet implemented feature allowing policies to be
composed using a small suite of combinators.

Let's delete that unnecessary complexity unless and until we decide we
want to implement those features.