Stop using loop kwarg in asyncio.wait() call (DeprecationWarning)

[Jackenmen]

Calling loop.create_connection() currently causes Python to send DeprecationWarning, this PR solves it.

// edit: I also removed use of loop kwarg in aio_gather calls
// edit2: Fixes #314

[Jackenmen]

Now looking at asyncio.gather's code, the DeprecationWarning doesn't show when it's called with at least one awaitable so I might have done the removal of loop kwarg from aio_gather calls unnecessarily. Let me know if it should stay like that or if I should revert it.

[1st1]

Thanks, I think the PR is great!