This release contains most (if not all) of the breaking changes to standalone
configuration that are currently anticipated for the v0.7.* release series.

Note: v0.7.0 wasn't announced widely, because it was mostly just a clone
of v0.6.16.

Breaking changes:

• configuration / webapp-builtins:
  • Totally reworked rate limiting. There is now a separate class per thing that
    can be rate-limited -- ConnectionRateLimiter, DataRateLimiter, and
    RequestRateLimiter -- and configuration uses unit quantity classes for all
    the token bucket stuff.
• async / webapp-util:
  • Moved TokenBucket from async to webapp-util. It was the only
    not-particularly-simple class in async, and its placement in that module
    had become the source of a module dependency cycle.
  • Renamed IntfThreadlike to IntfThread.
  • Made EventSink implement IntfThread.
• clocky / clocks:
  • Renamed module to clocky, to harmonize with the other *y modules.
• collections:
  • Renamed classes to be more sensible: TreePathMap -> TreeMap, and
    TreePathKey -> PathKey.
• data-values:
  • Filled out the comparison methods in Moment, and made them match the ones
    added to UnitQuantity (see below).
  • Reworked UnitQuantity.parse(), with much more straightforward
    functionality, including the addition of optional unit conversions.
• loggy-intf:
  • Removed FormatUtils.byteStringFrom() in favor of
    ByteCount.stringFromByteCount() (see below).

Other notable changes:

• clocky:
  • Added waitFor() to the interface IntfTimeSource.
  • Extracted MockTimeSource from TokenBucket.test.js, for use throughout
    the system.
• compy:
  • New classes BaseWrappedHierarchy and BaseThreadComponent.
• data-values:
  • Added comparison methods to UnitQuantity.
  • New classes ByteCount and ByteRate, both unit quantities.
• webapp-builtins:
  • New applications RequestDelay and SuffixRouter.