Maestro 0.2.3

Signed-off-by: Maxime Petazzoni <max@signalfuse.com>
Better display of pull completion when invoked standalone

Signed-off-by: Maxime Petazzoni <max@signalfuse.com>
Add note about pip install on MacOS. Fixes #77

Signed-off-by: Maxime Petazzoni <max@signalfuse.com>
Restart policy can be set

docker-py 0.5.0 required
it works only with docker > 1.2.0.