Shelljs for Windows users.

@XhmikosR I ported a few more tasks to `make.js` and added back the `Makefile` for nginx tasks and to wrap `make.js`. This is mostly to support existing deployment automation that requires it. I don't love the redundancy and may at some point move the nginx tasks to a script, but for now this will suffice.

Your feedback would be appreciated.

Cheers!