Added a node module

This splits the project into a web module that is identical to what was built before, and a module for use by node. I based this off the webjars/less.

The motivation behind this was to provide a fix for webjars/require-css#3. Though I still can't get the rjs optimizer to work with require-css. I'm hoping @jamesward or @huntc can give shed some light on this. Thanks!