Remove and readd all head elements to ensure script tags get executed again.  Don't remove attributes to not break Typekit and the like.
Restore remove and add vars
Switch to our own cloneNode implementation to ensure script tags get reexecuted

Conflicts:
	instantclick.js
Merge branch 'drop-in' of github.com:EagerApps/instantclick into drop-in

Conflicts:
	instantclick.js