Update Getting Started

Bring Getting Started up-to-date

We should also remove the term "experimental" from this string in the About Dialog:

```js
        "EXPERIMENTAL_BUILD"       : "experimental build",
```

But I wasn't sure if it's OK to just update the string, or also update the string id?

@Mark-Simulacrum That's another one that I thought about, but seems to be OK for 1.0 -- what does everyone else think?