Add suport for non-stream stats of containers
Add suport for non-stream stats of containers

Adds one more flag to the `stats` method for streaming responses.
Keeps default as streamed response for backwards compatibility.

Signed-off-by: Antonis Kalipetis <27fcf72a2b91bd9d3b77dd16ab258e87cf020462@gmail.com>

auready/docker-py,TomasTomecek/docker-py,vpetersson/docker-py,youhong316/docker-py,funkyfuture/docker-py,kaiyou/docker-py,minzhang28/docker-py,rhatdan/docker-py,Faylixe/docker-py,bfirsh/docker-py,tbeadle/docker-py,auready/docker-py,kpavel/docker-py,youhong316/docker-py,ColinHuang/docker-py,minzhang28/docker-py,vdemeester/docker-py,vpetersson/docker-py,kaiyou/docker-py,bfirsh/docker-py,aiden0z/docker-py,rancher/docker-py,dlorenc/docker-py,Faylixe/docker-py,schu/docker-py,dimaspivak/docker-py,funkyfuture/docker-py,docker/docker-py,docker/docker-py,aiden0z/docker-py,vitalyisaev2/docker-py,vdemeester/docker-py,ColinHuang/docker-py,dimaspivak/docker-py,uggla/docker-py,mark-adams/docker-py