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

src/core/base.js

@@ -8,7 +8,7 @@ var jasmine = {};
 
 // TODO: do we need this now that we have boot.js?
 if (typeof window == "undefined" && typeof exports == "object") {
-  exports.jasmine = jasmine
+  exports.jasmine = jasmine;
 }
 
 /**
@@ -18,14 +18,6 @@ jasmine.unimplementedMethod_ = function() {
   throw new Error("unimplemented method");
 };
 
-/**
- * Use <code>jasmine.undefined</code> instead of <code>undefined</code>, since <code>undefined</code> is just
- * a plain old variable and may be redefined by somebody else.
- *
- * @private
- */
-jasmine.undefined = jasmine.___undefined___;
-
 /**
  * Default interval in milliseconds for event loop yields (e.g. to allow network activity or to refresh the screen with the HTML-based runner). Small values here may result in slow test running. Zero means no updates until all tests have completed.
  *