Merge remote-tracking branch 'origin/gh-pages'
toolbar in summary, radio buttons for metadata, license

still to do on this mockup: toc icons/menu, no-book-metadata case
prompt user to set book metadata first if it's blank
make toc icons/actions more as on production mock-up branches

unfinished (dropdown doesn't yet work)
Merge remote-tracking branch 'origin/master' into gh-pages