query_string from the gaia email app, apache 2 licensed.
barely working now.  had to ditch react-router for dep reasons

react-router wanted to get at the internals of react which was not working
out with react being a browserify-produced UMD representation.  A basic "volo
install" of react didn't quite work immediately, so I decided since we don't
remotely need fancy routing stuff here, we could survive without it
react uses className, not class for the "class" attribute