API2
 - Request token only usable once
 - Auth token only usable once
 - More info in /current_user_on_site.json
 - In sysadmin, list history
Tidyied up Sysadmin History
 - show changes to fields
 - added icons
 - removed stray </li>
 - added area history
Remove reset.css as a seperate request, instead bundle into normal CSS.
 - solves a bug where I had missed reset.css from one site
 - and one less request for browser to make is better performance
Sysadmin - if Single Site mode, just link direct to that site not sites
Display board: fix header for single site
Display Board - change colour to match rest of site