Add vagrant file

This is a first pass to start using vagrant in the dev workflow on a Mac. 

It simply builds a 14.04 vagrant box and adds the bare essential packages to build cattle.
The Source directory is shared with the VM.

To get started:
    > git clone git@github.com:cattleio/cattle.git
    > cd cattle
    > vagrant up
    > vagrant ssh
    > cd /src/cattle
    > make build

When done building artifacts are available on the host in the dist/server/artifacts directory.