Docs update to-do #264

Today's branch aims to do the following:
Done 22/07

• Check for some missing links that I know exist

  • Portico
  • C/LOCKSS
  • Article metadata - metadata on JW
  • editor - typesetting -> typesetter

• Update example CSV with two author article example

• Imports/Exports capitalisation

• Hunt for the updated proofreader guide

• Check author guide for duplicated section (I have a vague memory of this)

• Merge the two duplicat form element sections that are currently in two places.
  To-do still:

• Update the contributor guide + styleguide. May merge them into one file.

• Work on (maybe even finish) the navigating JW guide