Process a hosts file in each project directory and add to /etc/hosts
Require only the host name in a project's hosts file

Provisioning is able to take the host name and concatenate it with 127.0.0.1 to build the internal hosts file.

This sets us up to get a bit fancy with the hostsupdater plugin
Process each project's hosts file for use with the vagrant-hostsupdater plugin

Each project can specify it's domain name in a `hosts` file that will then be processed on each `vagrant up`