Support get and load image

Fix joining of unicode and byte strings in python3

Check logs response in unit tests, and fix log integration tests for
py3.

remove_image and remove_container : new params

Avoid version duplication

Added Client.ping() method

Added dns_search parameter to client.start()

logs support for api v1.11 new endpoint

Universally-compatible reading of chunked streams

memory swap limit support

Add NetMode to hostConfig in start

Legacy volume binds

Signed-off-by: Maxime Petazzoni <max@signalfuse.com>

Added ability to specify the full build context

From api 1.10 dns and volumes_from should be passed to start()

Fix integration test regression

Don't require websocket-client on Python 3

Docker introduced newlines in stream output in version 0.9
(https://github.com/dotcloud/docker/pull/4276), but not to all
endpoints - POST /images/create, for example, does not include them.

This reverts to the old, less pleasant implementation of
_stream_helper(), with a manual check for newlines to fix the problem
described in #176 and fixed in #184, without the accompanying
regression. It should work against Docker 0.8, 0.9 and 0.10, both when
building and when pulling.

The test for starting a container with volume binds hadn't been updated
to use the new dictionary structure for the `binds` argument.