CoffeeScript support

[punmechanic]

Hi,

loader.js only allows for .js files to be loaded. Consider removing the path extension restriction and removing the extension based on path.extname:

    if (fs.statSync(file).isFile()) {
      var filePath = '^' + path.join(path.resolve(root), '/');
      var ext = path.extname(file);
      filePath = filePath.replace(/\\/g, '\\\\');
      paths[file.replace(new RegExp(filePath), '').replace(ext, '').toLowerCase()] = file;

[zedgu]

what's the extname of coffeescript ?
i don't think we should load all format files, except js.

[punmechanic]

@zedgu coffeescript can be in .coffee, .litcoffee, .md.coffee, probably a few others
I think it at the very least makes sense to leave it up to the user of the package to decide what they want to load.

[zedgu]

new option api for extname , checkout v0.2.2