Add arrows to openable sections
Finish off styling of clickable list items

- Push padding onto title giving open/close trigger a bigger touch target
- Make clickable areas cursor:pointer
- Move up/down arrow background onto title
- Add padding to stop the text running into the arrow
Add set up links to non-embedded documents

- Determine if a section is a leaf node (on presence of section['body']) and then either include body or link to next parent page
- Includes styles for link-out
- Change js to only attach to sections that have a body
Remove special styles for headings

After a chat with Stephen McCarthy, removing special larger styles for headings of opened sections.
Move section arrows to the left

Another design tweak from Stephen McCarthy.
Replace url(image-path with image-url

For internal consistency
Add href to self rather than an empty tag

(Rest of work to make these links mean sensible things as part of a future ticket)
Swap arrows for ones in design as sprite
Separate selectors onto different lines for readability
Add hover style to section titles
Merge pull request #12 from alphagov/finish-section-lists

Finish section lists