Build and style static get involved page

David added page to home controller and config routes. I'm not sure wy but the highlighted tab is How Gov Works.

https://www.pivotaltracker.com/story/show/44946241
update headers add dl and other changes in response to branch feedback

https://www.pivotaltracker.com/story/show/44946241
Pull request - https://github.com/alphagov/whitehall/pull/285
updating header copy and removing jump links

https://www.pivotaltracker.com/story/show/44946241