added #menu.clear()
Replace jquery with component/dom

Note triggering focus event doesnt quite work yet
Fix triggering focus event on selected menu item

Bind click directly to link elements
el and items[slug] return plain els, not dom-wrapped els
Merge branch 'remove-jquery' of github.com:ericgj/menu into ericgj-remove-jquery
updating to latest versions of component/dom
Merge branch 'master' of github.com:MatthewMueller/menu into MatthewMueller-master
component/dom does not have empty method yet