* async-file.el: Removed.
* dired-async.el: Removed.
* helm-async.el: Rename all with dired-async prefix instead of helm-async.
* helm-async.el: Use cl-lib instead of cl.
Rename helm-async.el to dired-async.el
* dired-async.el: Finish converting all names to dired*.
* dired-async.el (helm-async-be-async): alias for dired-async-be-async.