Adding userspace compatibility file for new debugfs in accelio kernel

Signed-off-by: Eyal Salomon <esalomon@mellanox.com>
Adding interface for xio_mempool.

allowing applications to use Accelio internal mempool object to manage
application buffers

Signed-off-by: Eyal Salomon <esalomon@mellanox.com>
Updating gitignore

Signed-off-by: Eyal Salomon <esalomon@mellanox.com>