banner(angularattack): add homepage promo for angular attack

public/_includes/_hero-home.jade

@@ -4,4 +4,9 @@ header(class="background-sky")
 
     .hero-cta
       a(href="/docs/ts/latest/quickstart.html" class="md-raised button button-large button-plain"
-      md-button) Get Started
+      md-button) Get Started
+
+.banner.is-centered
+  .banner-ng-annoucement
+    h4 Announcing Angular Attack — a 48 hour online hackathon on May 14 - 15th, 2016. 
+      a(href="https://www.angularattack.com/" target="_blank") Register Today

public/news.jade

@@ -4,6 +4,18 @@
   .clear
 
 .grid-fluid
+  .c6
+    .article-card
+      .date March 2, 2016
+      .title
+        a(
+        target="_blank"
+        href="http://angularjs.blogspot.com/2016/03/hosting-inclusive-angular-events-ideas.html"
+        ) Hosting Inclusive Angular Events: Ideas from AngularConnect
+      p We care a lot about making Angular's community inclusive and welcoming for everyone. Guest bloggers Vicky Carmichael and Ruth Yarnit are part of the White October Events team that co-organises AngularConnect...
+      .author
+        img(src="/resources/images/bios/naomi.jpg")
+        .posted Posted by <b>Naomi Black</b>
   .c6
     .article-card
       .date February 3, 2016
@@ -16,18 +28,6 @@
       .author
         img(src="/resources/images/bios/brad-green.jpg")
         .posted Posted by <b>Brad Green</b>
-  .c6
-    .article-card
-      .date January 11, 2016
-      .title
-        a(
-           target="_blank"
-           href="http://angularjs.blogspot.com/2016/01/angular-2-mit-open-source-licensed.html"
-        ) Angular 2: an MIT Open Source Licensed Framework
-      p As of beta.2 this week, we're moving Angular 2, its related libraries, and any code snippets and examples to the MIT license. Open source licenses are meant to protect developers by making it clear how code can be...
-      .author
-        img(src="/resources/images/bios/naomi.jpg")
-        .posted Posted by <b>Naomi Black</b>
 .grid-fluid.l-space-bottom-2.l-space-top-4
   .c12.text-center
     h3.text-headline.text-uppercase  Developer Community

public/resources/css/module/_banner.scss

@@ -6,8 +6,8 @@
 
 .banner {
   background: $mist;
-  padding: ($unit * 4) ($unit * 6);
-  min-height: $unit * 6;
+  padding: ($unit * 2) ($unit * 6);
+  min-height: $unit * 1;
 
   @media handheld and (max-width: $phone-breakpoint),
   screen and (max-device-width: $phone-breakpoint),