Rulings MVP in the sidebar

[jehlers]

The Rulings MVP feature should live in the sidebar the same way the CFPB SxS tool works.

• It should default to open and be gold IF that section has related rulings.
• The rulings should be listed in order starting with the most recent.
• The user can close the module if they want to.
• The links take users out to a new tab with the PDF of the ruling.

I can post more about the specific styles later today.

[cmc333333]

Still needs 18F/regulations-site#102 and #379.

[cmc333333]

All merged