Theme Updates III

Latest codedump from the Antipodes. Big pile of marsupial poo heading your way. :D

This one should fix #517, definitely fixes #565, and catches the last stragglers of the quickbuttons elements' new classes that I missed earlier.

Also has lotsa other goodies, including the start of the CSS split that was posted about here.

There are a couple of readmes (very short ones) tucked in the zip.