Basic documentation

[glenrobson]

There should be enough documentation for a user to be able to:

• Install the library in react
• Use the library with plain HTML
• Basic details on adding styling

[glenrobson]

Add it to commons docs.

Include code sandbox examples.

Try to do before Naples.

[glenrobson]

Mat has started work on this but will wait for the new pull requests to be merged before completing this work as the instructions will change. Hope to have a pull request in the next few days.