testing server: container naming handling
testing server: missing created timestamp at buildImage
client: remove unnecessary else clause

Related to #170.
Add ExtraHosts to HostConfig.
Merge pull request #172 from nitrous-io/extra-hosts

Add ExtraHosts to HostConfig
test server: add slash to the name of containers
Merge pull request #174 from mcuadros/master

test server: add slash to the name of containers
Merge branch 'master' of github.com:jbdalido/go-dockerclient
Add NewClientFromEnv
Check scheme of "tcp" DOCKER_HOST based on port

* Port 2376 will be HTTPS; everything else will be HTTP