Summary:
The Getting Started guide is one of the first documents a new user will encounter. This pull request aims to minimize the amount of time it takes to get a React Native app up and running.
* The original section title, "Required prerequisites", is redundant. "Installing React Native" is a better description of what this section is about.
* Detailed installation instructions for each of the required tools are delegated to the first party instructions where available.
* If the installation instructions already take care of installing the latest version, there's no need to warn the user about the minimum required version.
* Assume the user is familiar with Homebrew or Chocolatey, and defer installation instructions to the package manager's website. The installation and explanation of what a package manager is is out of scope within this document.
* Link to Node.js package manager instructions and let savvy Linux users use the pack
Closes https://github.com/facebook/react-native/pull/8010
Differential Revision: D3407029
Pulled By: JoelMarcey
fbshipit-source-id: c8b25d5b176c40eb58e5d7d3c6f13d43cde65166
8324e92f76