Present FOI & Transparency research papers on the front page

[garethrees]

A specific of #791.

95% of our users won't necessarily read the papers, but it shows that we're about more than just running a service.

Basically copy & paste of https://economicprinciples.org. Should be quite a quick win.

The paper summaries can get quite long. We don't want to have to write lots of new content for updates, so I think just rendering the title and image is fine.

We should have a "Donate £10 to support our research or browse more" link at the end.

I don't think research.mysociety.org has a feed so we'd have to manually update them now and then, but that feels fine. Not worth a huge engineering effort as they're relatively low frequency. We can either just hard code the ones we want, or create a data structure and pick a random selection, along the lines of:

@research_articles = [
  { title: 'Improving oversight of Access to Information',
    url: 'https://research.mysociety.org/publications/improving-oversight' },
  # and so on…
]

<% @research_articles.sample(6).each do |article| %>
  <div class="research-article">
    <!-- … -->
  </div>
<% end %>

[garethrees]

Some relevant papers

• Improving oversight of Access to Information
• Public FOI: Freedom of Information in central government
• Freedom of Information in Local Government
• WhatDoTheyKnow and Central Government FOI
• Research into mySociety’s online Freedom of Information platform, Alaveteli
• Clearing House
• Reforming FOI
• FOI Monitor
• Better case management of FOI and SARs: Research findings

There's also some WDTK-specific datasets.

[lucascumsille]

PR here: https://github.com/mysociety/whatdotheyknow-theme/pull/1542/files#