Implement ChildIterable and test it.  One feature of ChildIterable still
needs a sunny day test, then we need to start the code coverage, since I
think there are still a lot of holes in the testing
Write test find bugs.  Or in this case that I wasn't properly supporting
@Optional (which now I am).  This test also ensures that dynamic changes
to children is properly reflected
Test for the byKey verb of ChildIterable
Implement the "byKey" verb
Add in failing test case for starting the configuration subsystem late,
which appears to NOT work
Merge upstream/master