Updated the readme with further instructions

on how to configure and run the tests against a local dev-build instance.
Update readme.md
created a table of contents
handle empty criteo value
fixing video preroll clickbox
control bar above vast blocker
Add All Bestsellers to Agent

Instead of just taking the top 5 from each list
we now keep all the books in each list.
This means that we can look up more ISBNs
for the Inline Merchandising slot.
Soon we won't be looking up ISBNs in the bestsellers feed in this way.
Hide most popular video component on children's books
Provide tag combiner href in Video in Section
Use full sectionTag
Provide an endpoint that allows client to specify a series id for exclusion
Update the video section routes
Change more in section endpoint depending on if there is a series
Change over to date and then collection id
Use section id rather than section name
hide fullscreener when using native controls
Support Multiple Items in CAPI Components
Merge branch 'change-archive-format'
Flush copied article on login and drag.
Merge pull request #5354 from guardian/kc-book-choice

Make All Bestsellers Available for ISBN Lookups