Documentation Update: Explain Droplet Creation

In Droplets/Create a New Droplet, change:

`A Droplet will be created using the provided information. The response body will contain a JSON object with a key called droplet. The value will be an object containing the standard attributes for your new Droplet:`

To:

`A Droplet will be created using the provided information. The status of a newly created droplet begins as "new" and resolves to "active" when ready to use, just as it's associated action's status moves from "in-progress" to "completed". The response body will contain a JSON object with a key called droplet. The value will be an object containing the standard attributes for your new Droplet:`