feat(Vagrantfile): use "virtio" network devices by default
chore(controller): update psycopg to 2.5.4

http://pythonhosted.org//psycopg2/news.html#what-s-new-in-psycopg-2-5-4
http://pythonhosted.org//psycopg2/news.html#what-s-new-in-psycopg-2-5-3
ref(cache): just use go. remove bash script
Typo
chore(builder): update Docker engine to 1.3.0
fix(controller): use docker cache