externalized jQuery

this reduces build times and improves cacheability

however, it increases complexity (the jQuery path must now be maintained
in both `package.json` and the respective HTML files) and is somewhat
inconsistent (pjax is not externalized) - but such is the nature of
optimizations
introduced templating for generating static pages

in the process, replaced pointless `index.html`
added individual member pages

inane sponsor hard-coded for the moment

note that profile images do not exist yet
fixed pjax invocation

plus modified default motto to be more subtly subversive
switched to bootsketch

because we can