Added grunt to project.

Move from embedded "fork" of jsHint to using grunt's jsHint module.
Cleaned ALL jsHint errors.
Added jasmine.util.isUndefined as alternative to extra careful protection against undefined clobbering

Gruntfile.js

@@ -0,0 +1,24 @@
+module.exports = function(grunt) {
+
+  // Project configuration.
+  grunt.initConfig({
+    pkg: grunt.file.readJSON('package.json'),
+    jshint: {
+      options: {
+        /* While it's possible that we could be considering unwanted prototype methods, mostly
+         * we're doing this because the objects are being used as maps.
+         */
+        forin: false,
+
+        /* We're fine with functions defined inside loops (setTimeout functions, etc) */
+        loopfunc: true
+      },
+      all: ['src/**/*.js']
+    }
+  });
+
+  grunt.loadNpmTasks('grunt-contrib-jshint');
+
+  // Default task(s).
+  grunt.registerTask('default', ['jshint']);
+};