Crates v0.9.0 release

Merge pull request #163 from TimelyDataflow/v0.9-release

V0.9 release

v0.8.0 crates.io release

Tracking timely 0.8.0 release, and with a few local improvements.

Many examples were removed, in preference of more common graph code in algorithms/graphs.

Undoubtably many other undocumented changes; sorry! Will work harder to improve!

v0.7.0

This release tracks timely's v0.7.0 release, but has relatively few changes relative to the v0.6.0 release on crates.io. Some logging has been introduced as part of tracking memory usage.

Version 0.2.0 on crates.io

This release corresponds to a release to crates.io, made to fix some breaking changes in timely_communication, but also snapshotting the current state of affairs. It is a totally breaking release, and so gets bumped up from 0.1.*.

Compaction

This release features compaction of traces as streams and computation advance. It should now be possible to run computations indefinitely without degradation due to accumulation of differences (the append-only logs are compacted as appropriate).