Quick win for server based compilation (based on https://github.com/daggerrz/scala-coffee), but I have a few open questions that need to be answered before merging:
Coffeescript compilation support for coffeescript filter
An optional dependency on rhino sounds fine to me; added an enable/disable flag too. Still pondering the line number issue...
Sounds good, most will probably opt to use the compiler once it's there and for those who don't want the extra dep, a flag should solve their problems. Line numbers would be really useful, but it looks like that will require some refactoring of the Scalate pipeline. I'm not familiar enough with the source to make any suggestions, though...