This one swaps out dojo entirely. I wish that there was a way to divide
tasks between dojo and nojo, but the module loader system makes this
more or less impossible, or at least incredibly annoying.
underscore also handles the issue of a cross-browser .forEach, but
supports the rest of the functional toolkit, so allows us to express
stuff like tag filtering more efficiently. It's also a pretty
common ingredient in other JS code so should feel familiar to a bunch of
people.
