fix(image_to_vm): Use saved version info instead of parsing directory.

Trying to include version info by adding the directory name to VM image
names didn't work and a better solution is for build_image to write out
a version.txt file. This should also fix an issue where uploading from
image_to_vm.sh didn't always go to the same location as the images
uploaded from build_image did.
feat(image_to_vm): Basic vagrant disk image support

This just generates a vdi that includes the vagrant ssh key.
fix(image_to_vm): Use vmdk+ovf for virtual box images.

Now we have a config file that can be imported into VirtualBox.
fix(image_to_vm): Use vmdk disks for vagrant and write configs.

Vagrant will need the virtualbox ovf plus its own Vagrantfile config.
After this we will need an optional "package" step to this script to
take these files and bundle them into a .box tarball. This could also be
used to switch from .ovf+vmdk for plain virtualbox images to a bundled
.ova archive which combines the two.
fix(image_to_vm): Remove unused --prod flag, prod_image is the right one
fix(image_to_vm): Add VM MAC address to Vagrantfile, create box image.

Vagrant should now be good to go!
Merge pull request #72 from marineam/vlite

vagrant image with oem partition