chore(angular/providers): making progress on angular providers, fix merge issues

* chore(input): remove interface .d.ts file, move to .ts file

* refactor(angular): start working on providers, etc

* chore(angular/dependencies): update deps for angular demo

packages/angular/src/util/util.ts

@@ -0,0 +1,17 @@
+
+export function hydrateElement(element: any) {
+  return element.componentOnReady();
+}
+
+export function getElement(elementName: string) {
+  return document.querySelector(elementName);
+}
+
+export function ensureElementInBody(elementName: string) {
+  let element = getElement(elementName);
+  if (!element) {
+    element = document.createElement(elementName);
+    document.body.appendChild(element);
+  }
+  return element;
+}