feat(ui-view): render default content inside <ui-view>.

Closes angular-ui/ui-router#3023

Author: aitboudad

src/ng2/directives/uiView.ts

@@ -109,7 +109,10 @@ const ng2ComponentInputs = (ng2CompClass: Type<any>) => {
  */
 @Component({
   selector: 'ui-view, [ui-view]',
-  template: `<template #componentTarget></template>`
+  template: `
+    <template #componentTarget></template>
+    <ng-content *ngIf="!componentRef"></ng-content>
+  `
   // styles: [`
   //   .done-true {
   //     text-decoration: line-through;

src/ng2/uiRouterNgModule.ts

@@ -1,6 +1,7 @@
 /** @module core */ /** */
 import {Ng2StateDeclaration} from "./interface";
 import {NgModule, OpaqueToken, ModuleWithProviders, ANALYZE_FOR_ENTRY_COMPONENTS, Provider, Type} from "@angular/core";
+import {CommonModule} from "@angular/common";
 import {_UIROUTER_DIRECTIVES} from "./directives/directives";
 import {UIView} from "./directives/uiView";
 import {RawParams} from "ui-router-core";
@@ -31,6 +32,7 @@ import {_UIROUTER_INSTANCE_PROVIDERS, _UIROUTER_SERVICE_PROVIDERS} from "./provi
  * Any routed components are added as `entryComponents:` so they will get compiled.
  */
 @NgModule({
+  imports: [CommonModule],
   declarations: [_UIROUTER_DIRECTIVES],
   exports: [_UIROUTER_DIRECTIVES],
   entryComponents: [UIView],
@@ -219,4 +221,3 @@ export const UIROUTER_ROOT_MODULE = new OpaqueToken("UIRouter Root Module");
 
 /** @hidden */
 export const UIROUTER_MODULE_TOKEN = new OpaqueToken("UIRouter Module");
-