Address slideshow FOUC.  Provide JS fallback

Although, admitedly with obscure CSS selectors.  IE 8 with JS disabled
is getting a pile of images, but who are those jerks, seriously?
The 150th is over now (that it's 2014)
Merge branch 'master' of github.com:umts/umass.edu-transit
Make deploy:cleanup work with OITs crippled shell