Make rake jasmine:ci run specs correctly.

- Will replace rake core_specs.
- Remove obsolete dependencies & files -- most of these were for build tasks we
  are no longer using. Notably, rspec and spec_helper were deleted.

spec/javascripts/core/UtilSpec.js

@@ -0,0 +1,28 @@
+describe("j$.util", function() {
+  describe("isArray_", function() {
+    it("should return true if the argument is an array", function() {
+      expect(j$.isArray_([])).toBe(true);
+      expect(j$.isArray_(['a'])).toBe(true);
+    });
+
+    it("should return false if the argument is not an array", function() {
+      expect(j$.isArray_(undefined)).toBe(false);
+      expect(j$.isArray_({})).toBe(false);
+      expect(j$.isArray_(function() {})).toBe(false);
+      expect(j$.isArray_('foo')).toBe(false);
+      expect(j$.isArray_(5)).toBe(false);
+      expect(j$.isArray_(null)).toBe(false);
+    });
+  });
+
+  describe("isUndefined", function() {
+    it("reports if a variable is defined", function() {
+      var a;
+      expect(j$.util.isUndefined(a)).toBe(true);
+      expect(j$.util.isUndefined(undefined)).toBe(true);
+
+      var undefined = "diz be undefined yo";
+      expect(j$.util.isUndefined(undefined)).toBe(false);
+    });
+  });
+});