don't copy arguments or caller from require

causes an error in io.js where strict-mode is set on internal modules

Fixes: https://github.com/jashkenas/coffeescript/issues/3810

lib/coffee-script/coffee-script.js

@@ -175,7 +175,7 @@
         ref3 = Object.getOwnPropertyNames(require);
         for (i = 0, len = ref3.length; i < len; i++) {
           r = ref3[i];
-          if (r !== 'paths') {
+          if (r !== 'paths' && r !== 'arguments' && r !== 'caller') {
             _require[r] = require[r];
           }
         }