* A second attempt to avoid the flume memory leak, since the first didn't actually work
* No luck with second flume fix, so revert to futures::mpsc in a few places)
* cargo fmt
* Add a comment to cover use of into_stream
* Tweak rolling_total test to also confirm capacity doesn't go nuts
* Use Jemalloc
* Avoid flume's into_stream and use a workaround for now
* cargo fmt
* Improve comments now that there's an issue to point to
* Only remove the feed that disconnected to not break the rest...
* use multimap struct to avoid sync issues between feed and chain
* add a remove test, too
* cargo fmt
* fix name of test
* move multimap to common so we can doctest it and add 'unique' to name
* cargo fmt
* Return old key if value moved to make uniqueness more obvious
James Wilson