remove empty files
Remove all header stylings and move to new header syntax everywhere.
Add styling for the new headings.

- Updated 'heading-block' to 'headings-block' as heading block is
  already a thing.
- Added padding divs on meta information
Remove minified bootstrap code

It was causing problems with my find in project and I can not see any
benifit of keeping them around. We minify the uncompressed versions
with the asset pipeline for production.
Refactor past foreign secretaries to share layout

Seemed pointless updating the heading in every file when it could be
shared and templated.
Make some small headings big and fix layouts
Update document filter for new header markup
Update tests for new heading structure
Remove document page header as no longer used
Remove unused selector
Fix last couple of headings
Add rtl support to new heading blocks
Fix tab widths on policy pages
Merge pull request #589 from alphagov/new-headings

New Headings