some touches to banner and api docs

public/_includes/_hero-home.jade

@@ -8,7 +8,7 @@ header(class="background-sky l-relative")
 
     announcement-bar
       .announcement-bar-slide.clearfix
-        img(src="/resources/images/logos/angular2/angular.svg" width="40")
+        img(src="/resources/images/logos/angular2/angular-logo-banner.png")
         p Angular 2.0 Final Release Now Live!
         a(href="http://angularjs.blogspot.com/2016/09/angular2-final.html" target="_blank" class="button " + "md-button") Learn More
 

public/resources/css/module/_api.scss

@@ -63,7 +63,8 @@
   }
 }
 
-.docs-content .h2-api-docs {
+.docs-content .h2-api-docs,
+.docs-content .h2-api-docs:first-of-type {
   font-size: 18px;
   line-height: 24px;
   margin-top: 0;