Added: more readable table cells
Added: Rooms are now referenced in _data/rooms. Schedule talk are expected to be listed using the _data/rooms order or have a room: attribute to override label
Added: interpage links. I may have gone using site.pages.foo.url instead
Added: Bootstrap menu. Fix needed for responsive hamberger icon
Added: External dependencies are hosted on public CDN, at least for now
Added: 1 line of doc. meh.