Clarify project specific server roles

Project specific roles should be clarified so that it is easier to maintain the requirements of multiple server configurations in this repository.

We'll need to best determine the naming for this as we go.

* `project-environment.conf` could specify something like `wsuwp-production.conf` for provisioning a server to run WSUWP in production. If this differs in any way from the requirements in the local machine, `wsuwp-vagrant.conf` can be used as a separate role.
* In an ideal world, a role specified with `project.conf` would work in both production and development, though this may not always be the case because of mapped drive locations, etc.