* Large refactor of all loader and store code to use asyncio patterns. Includes significant refactoring of associated tests and application code using them.
* Changed to use root logger for application logging.
* Improved several log messages with quoting.
* Added decorator event_handler for event coroutine support.
* Kickstart refactored to use asyncio event loop (was: Tornado event loop), and several decorators acting as coroutine/future adapters added.
* Kickstart refactored to delegate Tornado -> Celery task handling to asyncio's run_in_executor.
* Kickstart now supports HTTP GET for current session state.
* Librarian refactored to delegate workflow building to peer process for (potentially) better parallelism with complex workflows.
* Librarian refactored to use asyncio for workflow loading & store (was: threading).
* Librarian catalog-2, workflow-4 added to simulate a mock exception thrown in user Task.
* Kickstart: re-added missing Tornado settings parameters.