Implemented weak equality for jslint locally

... and BTW removed from global configuration

@@ -3,8 +3,7 @@
     "browser":       true,
     "debug":         true,
     "devel":         true,
-    "eqeqeq":        false,
-    "eqnull":        true, 
+    "eqeqeq":        true, 
     "evil":          true,
     "maxparams":     5,
     "maxdepth":      3,

@@ -80,6 +80,7 @@ exports.betterTypeOf = betterTypeOf;
  */
 function betterInstanceOf(input, constructor) {
     "use strict";
+    /*jshint eqnull:true */
     while (input != null) {
       if (input == constructor.prototype) {
         return true;