Subcommand to initialize a project

It would be useful to be able to initialize a complete project in Salty WordPress.

In our case, initializing means:

* [ ] Access the Salt master for a project's SLS file, and copy it locally.
* [ ] Run `salt-call --local state.highstate` on the project's SLS file.
* [ ] Create a database for the project, if one doesn't exist.
* [ ] Install WordPress for the project, if it isn't already installed.

Essentially, most of what we used to use Fabric for.