use natives instead of rolling our own eval

Author: isaacs

fs.js

@@ -1,11 +1 @@
-// eeeeeevvvvviiiiiiillllll
-// more evil than monkey-patching the native builtin?
-// Not sure.
-
-var mod = require("module")
-var pre = '(function (exports, require, module, __filename, __dirname) { '
-var post = '});'
-var src = pre + process.binding('natives').fs + post
-var vm = require('vm')
-var fn = vm.runInThisContext(src)
-fn(exports, require, module, __filename, __dirname)
+module.exports = require('natives').require('fs')

package.json

@@ -38,5 +38,8 @@
     "mkdirp": "^0.5.0",
     "rimraf": "^2.2.8",
     "tap": "^1.2.0"
+  },
+  "dependencies": {
+    "natives": "^1.0.1"
   }
 }