Add updated jshintrc

Most importantly this adds support for ES6

Author: orangejulius

.jshintrc

@@ -1,9 +1,22 @@
 {
   "node": true,
   "curly": true,
-  "latedef": true,
-  "quotmark": true,
+  "eqeqeq": true,
+  "esversion": 6,
+  "freeze": true,
+  "immed": true,
+  "indent": 2,
+  "latedef": false,
+  "newcap": true,
+  "noarg": true,
+  "noempty": true,
+  "nonbsp": true,
+  "nonew": true,
+  "plusplus": false,
+  "quotmark": "single",
   "undef": true,
   "unused": false,
-  "trailing": true
+  "maxparams": 4,
+  "maxdepth": 4,
+  "maxlen": 140
 }