docker-py 1.6 to use non stream stats

[jeanpralo]

@lebauce since docker-py 1.6 allows non stream socket, we could probably get read of that containerstats class but I guess for backward compatibility need to keep it for now.
#11 @jamtur01 I guess that covers what you wanted.

[jamtur01]

@jeanpralo Thanks!

[lebauce]

@jeanpralo Thanks for this !
Just nitpicking, could you please amend your commit to make the pep8 and flake8 tests pass ? (I added a .travis.yml file so your next push should trigger Travis)

[jeanpralo]

@lebauce done, my bad emacs was whining but I've done that on a Friday afternoon. I must have been more interested by the pub than the typo ;)

[lebauce]

Thanks @jeanpralo !