Page History

Many issues were reported with the large amount of new code written around value set loading and access.  This includes fixes to resolving value set function as well as value set hierarchy functions.  This also contains fixes to long standing history load issues, some tree extension issues and simple search API problems.  We updated an outdated tracking policy artifact in this release as well — removing a couple of failing value sets that were placeholders for issues that should be resolved.  This allows continuous integration to be more accurate and precise without any expected failures that can be ignored.