Added AsyncTaskLoader subclass which allows Models to be retrieved.
Very useful for backing list views.
Revert "Added AsyncTaskLoader subclass which allows Models to be retrieved."

This reverts commit 46d1f1b93e9d0fedd068251a61fb6475ec8a5408.
Revert "Added AsyncTaskLoader subclass which allows Models to be retrieved."

This reverts commit a669f6a3baa2497c345b7268045099ada08e9405.