update the wear device frame style. rename and make frame part of css.
also update some logic with next/prev links to make navigation prev
possible while in design docs (or others that allow cross-boundary nav)
and simply remove the 'next' link in the footer when at the end of a set.

Change-Id: I83008e313fb07c9bc028e27c06e0e8478fa525f0
4 files changed