Fix .PHONY
Needs them for Vagrant Docker provider
Optimize mount_options
IANA allocated Docker port: 2375

http://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xhtml?search=docker
Merge branch 'refs/heads/master' into alpha
Merge branch 'refs/heads/iana-port-change' into alpha
Bump version to v0.9.7 for CoreOS alpha 342.1.0