Richard van der Hoff d3347ad485 Revert "Use sortedcontainers instead of blist"
This reverts commit 9fbe70a7dc3afabfdac176ba1f4be32dd44602aa.

It turns out that sortedcontainers.SortedDict is not an exact match for
blist.sorteddict; in particular, `popitem()` removes things from the opposite
end of the dict.

This is trivial to fix, but I want to add some unit tests, and potentially some
more thought about it, before we do so.
2018-04-13 11:16:43 +01:00
..
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