Add Mavis national reporting user guide

[mikejamesthompson]

This adds the user guide for Mavis national reporting.

This is deliberately not linked from the homepage so it can reviewed prior to making it live.

We still need to hide the search box in the top right and ideally hide the "Changes to programme statuses" link in the footer.

[paulrobertlloyd]

Few things:

• should we use /national-reporting as the slug instead of /national-reporting given the word guide will already appear in the sub domain?
• should we add previous/next links to the bottom of these guidance pages (like we do on the pages for ‘big’ Mavis)
• should we add a link to this sub site from the home page, in case these users find themselves there?
• is ‘Accessing Mavis national reporting’ necessary (except maybe for completeness)?

[paulrobertlloyd]

Suggested change

	Mavis will automatically replace any incorrect NHS numbers in your upload or add any missing ones found by searching the NHS Patient Demographics Service (PDS) (sometimes called ‘the Spine’) overnight.
	Mavis will automatically replace any incorrect NHS numbers in your upload or add any missing ones found by searching the NHS Patient Demographics Service (PDS, sometimes called ‘the Spine’) overnight.

[paulrobertlloyd]

Update this screenshot with latest design

[paulrobertlloyd]

Slight visual artefacts on the active tab in this image

[paulrobertlloyd]

Lets also put images for national reporting in a /national-reporting subfolder of /assets/images.