Add quickstart steps with curl and bash

[MichaelCurrin]

Use bash script with curl. This makes it easy for people using the project for the first time. And means you don't need to clone to keep your clone updated, or specify paths to files.

This could be done with a script that depends on a local directory, but this is more fragile (not portable on machines and requires exact path and cloned repo). And its only advantage over curl approach is speed.