Draft header version 2 basic spec.
Corrected formatting, improved Tool Item HTML.
New header skeleton styling, construction of prioritised-content-filters, demos.
Readme tweaks.
Corrected widths of Tools container.
Added Nav behaviour and styling.
Corrected hiding of "More" nav link.
Fixed masthead overflow problem.
Updated demo markup.
Corrected positions of mega-dropdowns.
Corrected z-index of logo.
Filtered items now get added to the More lists.
Corrected alignment of level 2 nav when it's at right-edge of viewport.
Corrected font-size of drop down navigation items.
Corrected positioning of mega-dropdown.
Navigation "more" link text now changed depending in whether it contains all or some of the nav's links.
More list now only populated on demand rather than every re-filter.
Nav now supports opening an closing mega-dropdowns.
Updated mega-dropdown demo. Corrected populating More menu when the hidden element isn't a link.
Always <a> elements for nav items, even if they have no href.
Don't populate More menu when it is a control for a mega-dropdown.
Better detection of click outside of nav (for collapsing all).
Correct sizing of mega-dropdown.
Nav items without @href no can receive focus and be activated by keyboard.
Corrected megadropdown position on nav demo.
Now uses o-squishy-list instead of o-prioritised-content-filter
Moved icon styles into demo file.
Improved naming of demo nav items.
Changed tools to have generic names and different icons.
Clicking mega-dropdown no longer incorrectly closes it.
Corrected More Tools icon.
Corrected megadropdown contains condition.
Added multiple parent items to nav list.
Nav now collapses all expanded sibling items, regardless of level.
Moved list reset styles into nav stylesheet.