GitLab

* Add async transferer class

* Add async ndarray copy interface

* Add python bindings

* Fix comment

* Add python class

* Fix linting issues

* Add python unit test

* Update python interface

* move async_transferer to cuda only directory

* Fix linting issue

* Move out of contrib

* Add doc strings

* Move test compute from backend

* Update comment

* Fix test naming

* Fix argument usage

* Wrap/unwrap backend parameters

* Move to dataloading

* Move to 'dataloading'

* Make GPU/CPU compatible

* Fix unit tests

* Add docs

* Use only backend interface for datamovement in unit test