Initial checkin for Hart cobrand

Largely copied from template of Bromley code, substituting logo, council
ID, geolocation data, and renaming .scss variables etc.
Hart code cleanup and add is_two_tier
Remove Bromley references
Add Hart-specific links to footer
Shift FMS nav out of the main header
Update styling to follow Hart design more closely
Flip colours of nav to better indicate links
Make the header banner the entire width of the page
Stretch footer background to entire width of page
Add Hart top-level nav links
Correct header height on mobile
Correct wording of top menu item
Remove FMS logo from top of page
Shift top level nav to correct position
Invert media query so IE8 displays header properly
The little folding triangle makes no sense on this cobrand; hide it
Some more renaming of Bromley to Hart
Treat Hart the same as Bromley in the JS
Whitespace/formatting fixes
Basic test for Hart cobrand