This uses the sputnik13/trusty64 image rather then the official
ubuntu/trusty64 image in order to get libvirt provider support as
wall as virtualbox provider support.
Added Vagrantfile and simple provisioning script. This sets up the
packages, gems and databases so that `rake db:migrate` is ready to
run. This might be too much and perhaps more should be done by the
user themselves, I'm not sure...