Satisfy govuk_template vars for layout
Remove default express styles
Make it look GOV.UK-y-er
Fix form selector in features
Move some elements into partials

In order to preserve the shape of govuk_template.
Remove dupe OGL element
Simplify documentCount and registrationCount helpers

Remove unneeded imports.
Concatenate paramplus values with ampersand
Test registrationCount output
Tidy up app, remove unnecessary imports