Add the Polymer object observe library and add a test that it works.

perf/server/tests/oobserve.js

+describe('Confirm our polyfill of Object Observe works.',
+  function() {
+    beforeEach(function() { });
+    afterEach(function() { });
+
+    function testSimpleOO() {
+      // Let's say we have a model with data
+      var model = {};
+
+      var observations = [];
+
+      var observer = new ObjectObserver(model);
+      // Which we then observe
+      observer.open(function(added, removed, changed, getOldValueFn){
+        Object.keys(added).forEach(function(change) {
+          observations.push(change);
+        });
+      });
+      model["foo"] = "bar";
+      assert.equal(0, observations.length, "Observations should have been added.")
+
+      Platform.performMicrotaskCheckpoint()
+
+      assert.equal(1, observations.length, "Observations should have been added.")
+    }
+
+
+    it('should be able to use ObjectObserver', function() {
+      testSimpleOO();
+    });
+  }
+);