Remove package.json from subdir
Initialize for npm with package.json
Update dev dependencies

* coffee-script @ 1.6.3

This is due to the fact that the coffee command fails to properly map
literate source code when executing.

* async

Used for the Cakefile tasks
Update Cakefile

* Create a `coffee` helper that runs coffeescript using the
  locally installed executable.

* Use `exec` instead of `spawn` for child processes
Change to boco-sourced