* Moved to use asyncio for Loader and Store. This includes significant changes to both interface and implemetnations, as well as test cases.
* Moved several test cases use of setup() to a @property tree for more pythonic idiom style.
* Migraded librarian to use new asyncio loader.
* Refactored common Container to use a required_fields for less boilerplate code in child constructors.
* Moved back to the simple package prefix.