Fix for bug 254 necessitates a change to the env.pickle format.
0.25.0
I've slacked off on releases, and there have been some visible changes. So here we are, new release 0.25.0.
0.22.2
I've been neglecting GitHub releases, mistakenly believing that creating tags was sufficient. I will be more vigilant about this from now on.
This addresses issue 27
0.18.0
Overhaul of how the marcel Environment is transmitted to pipelines and ops. It is no longer held onto by an Op, which means it will not be transmitted remotely. This fixes bug212, and should generally make remote invocations lighterweight.