Upgrade Docker dependency from 1.9 to 1.10

Makefile

@@ -7,7 +7,7 @@ update-dependencies:
 	docker pull python:3
 	docker pull rancher/socat-docker:latest
 	docker pull appropriate/curl:latest
-	docker pull docker:1.9
+	docker pull docker:1.10
 
 test:
 	docker build -t jwilder/nginx-proxy:bats .

circle.yml

@@ -1,7 +1,6 @@
 machine:
   pre:
-    - sudo curl -L -o /usr/bin/docker 'https://s3-external-1.amazonaws.com/circle-downloads/docker-1.9.1-circleci'
+    - curl -sSL https://s3.amazonaws.com/circle-downloads/install-circleci-docker.sh | bash -s -- 1.10.0
-    - sudo chmod 0755 /usr/bin/docker
   services:
     - docker
 

test/lib/docker_helpers.bash

@@ -62,5 +62,5 @@ function docker_tcp {
 		--expose 2375 \
 		-v /var/run/docker.sock:/var/run/docker.sock \
 		rancher/socat-docker
-	docker run --label bats-type="docker" --link "$container_name:docker" docker:1.9 version
+	docker run --label bats-type="docker" --link "$container_name:docker" docker:1.10 version
 }