It would be nice to take the path relative to RED_SPIDER_ROOT for more robustness and less wheel-reinventing.

Even better would be to have `setup.py` (optionally?) copy the contents of `include/redbot` to `lib/redbot` (because it's a runtime dependency) and then have `rsshell` add `lib` to whatever environment variable Coffeescript uses to find libraries, so you can just `require path.join redbot, bot.coffee` here.