fix for issue #215, #216, and #218

[SRamezanH]

a quick fix for issues #215, #216, and #218. caused by updates in asyncio.

[LoKiToon]

I also found an AttributeError with the camera annotate script..

File "cozmo/annotate.py", line 181, in add_img_box_to_image
    if isinstance(text, collections.Iterable):

I made a simple fix.

if isinstance(text, collections.abc.Iterable):

[mhuebert]

loop=self.loop, should also be removed on line 452 of usbmux.py