Added closeModal() to the d.ts and updated the sample app.

apps/modal-views-demo/main-page.ts

@@ -16,4 +16,8 @@ export function onTap(args: observable.EventData) {
         console.log(username + "/" + password);
         label.text = username + "/" + password;
     }, fullscreen);
+}
+
+export function onCloseModal(args: observable.EventData) {
+    page.closeModal();
 }

apps/modal-views-demo/main-page.xml

@@ -3,5 +3,6 @@
     <Button text="Login (small)" tap="onTap" />
     <Button text="Login (full-screen)" tap="onTap" />
     <Label id="label" text="Anonymous"/>
+    <Button text="Close Modal" tap="onCloseModal" />
   </StackLayout>
 </Page>