Update readme with more info on how to run spec tests
Update readme with more info on how to run spec tests

marxarelli/vagrant,mitchellh/vagrant,sni/vagrant,sni/vagrant,chrisroberts/vagrant,sni/vagrant,marxarelli/vagrant,marxarelli/vagrant,chrisroberts/vagrant,marxarelli/vagrant,mitchellh/vagrant,sni/vagrant,chrisroberts/vagrant,mitchellh/vagrant,mitchellh/vagrant,chrisroberts/vagrant