Coffee-Script is needed in production so everything can work again

This is a temporary change so everything works again. Must be changed next week to:

* build all the JS in a specific folder build/
  * change `cake convert` to `coffee -b --output build/ .`
  * move back the coffee-script dependency to dev-dependencies
  * no more `require "coffee-script/register"`in server.coffee

* in order to make those changes work, we need to move from compound to americano