Bureau structure page

- Add bureau structure page contents.
- Add content slider functionality for mobile org chart.
- Add jump-link__back & jump-link__bg modifiers.
There are a few long lines here that make this github window scroll horizontally. Sometime there's nothing that can be done about sometimes there are opportunities to break this up into multiple lines. In this instance you could put each attribute on a new line. In other cases the class attribute is really long and you can break the classes onto new lines. It's just a little thing to make things easier to read for other people.