Litcoffee support

[svi3c]

Hello,

I just encountered a problem trying to test litcoffee modules.

The problem is a combination of three issues:

1. The coffee build transformer is registered by default in lib/sandboxed_module.js:10 and you cannot deregister it:

   var registeredBuiltInSourceTransformers = ['coffee'];

2. In lib/sandboxed_module.js:310 the expression

   this.filename.search('.coffee$')

   also matches .litcoffee files.

3. built-in transformers are run before any custom build transformer

So I see three possible ways to get around the problem:

1. Do not set the coffee transformer as default
2. Use String.prototype.indexOf() instead of String.prototype.search() or escape the . at the beginning of the expression
3. Provide the possibility to run custom transformers before the built-in transformers

[domenic]

Of those you mention, 2 sounds good no matter what. We should probably also do a 3.0.0 release that stops enabling coffee by default.