auto parse .json.ls, closes #884

Author: gkz

lib/node.js

@@ -29,7 +29,11 @@ module.exports = !(LiveScript) ->
     LiveScript <<<< events.EventEmitter.prototype
 
     require.extensions.'.ls' = (module, filename) ->
-        js = LiveScript.compile (fs.read-file-sync filename, 'utf8'), {filename, +bare, map: "embedded"} .code
+        file = fs.read-file-sync filename, 'utf8'
+        js = if '.json.ls' is filename.substr -8
+            'module.exports = ' + LiveScript.compile file, {filename, +json}
+        else
+            LiveScript.compile file, {filename, +bare, map: "embedded"} .code
         try
             module._compile js, filename
         catch