adds a first pass at the changing face interlude, without interactivity.
hand-merges master into this branch.
adds the links in the menus.
adds the faux-gif to the changing face interactive.
completes the faux-gif view for the changing-face interactive.
renames 'the changing face' to 'how we kill', and begins to add velma.
creates a mobile version of how-we-kill, and adds velma to the header menu.
fixes a bug wherein the menu item for the how-we-kill interlude didn't disable when the user was on the how-we-kill interlude.
removes superfluous text.
adds a super-small view for true mobile devices.
Merge pull request #95 from Etc-Gallery/add-the-changing-face-interlude

Adds the How We Kill interlude; closes #94, closes #93, and closes #57.