creating page and branch

https://www.pivotaltracker.com/story/show/46252609
king charles st content and styling
adding lancaster house page and content and tweaks
adding and updating images
tweaking header and list spacing
updating address format
doh, removing empty address
change span to div
Merge pull request #391 from alphagov/history-king-charles-street

History king charles street and Lancaster house

https://www.pivotaltracker.com/story/show/46252609