Add run and quit instructions for kit

[vickytnz]

Currently the guidance site doesn't mention anywhere how to quit the kit. In the GOV.UK guidance this is both in the install guide and a separate page on running the kit.

Suggested action is to:

• add quit instructions to both the simple and advanced run guide
• create a separate 'run the kit' page
• consider adding a 'create a prototype after you have installed the kit' or split the install guide into a first time use and then a repeat use.

Current GOV.UK IA:
Sections that are in the tutorials and guides menu are in bold.

(section on tutorials and guides: download and install)

• Getting started with the Prototype Kit
• Create a prototype for new users
  • Mac:
    • Prototype Kit requirements (Mac)
    • Install Node.js (Mac)
  • Windows:
    • Prototype Kit requirements (Windows)
    • Install Node.js (Windows)
  • Linux:
    • Prototype Kit requirements (Linux)
    • Install Node.js (Linux)
  • Create a prototype
  • How to run the kit
• Getting started - advanced guide

Older version of the kit

• Download the Prototype Kit (zip file) - zip file
• Installation guide for new users
  • Prototype Kit requirements
  • How to install the kit
  • How to run the kit
• Installation guide for advanced users