feat(aio): update the home page and docs landing page content (#17325)

Closes #17268
Closes #17230

aio/content/marketing/docs.md

@@ -5,8 +5,8 @@ Angular is a platform that makes it easy to build applications with the web. Ang
 <div class="card-container">
   <a href="generated/live-examples/quickstart/eplnkr.html" target="_blank" class="docs-card"
     title="Experience Angular in a live coding environment">
-      <section>Experience Angular</section>
-      <p>A quick look at an Angular application.</p>
+      <section>Get a Glimpse of Angular</section>
+      <p>A quick look at an Angular "hello world" application.</p>
       <p class="card-footer">Angular in Action</p>
   </a>
 

aio/content/marketing/index.html

@@ -32,10 +32,10 @@
     <!--Announcement Bar-->
     <div class="homepage-container">
       <div class="announcement-bar">
-        <img src="assets/images/logos/angular/angular-banner-logo-grey.png" width="64"/>
-        <p>Angular v4.0 is out! Smaller, faster, no biggie...</p>
+        <img src="generated/images/marketing/angular-mix.png" height="40" width="151">
+        <p>Join us at our newest event, October 2017</p>
         <button class="button">
-          <a href="http://angularjs.blogspot.com/2017/03/angular-400-now-available.html" target="_blank">Learn More</a>
+          <a href="https://angularmix.com/">Learn More</a>
         </button>
       </div>
     </div>
@@ -112,12 +112,12 @@
   <!-- CTA CARDS -->
   <div layout="row" layout-xs="column" class="home-row">
 
-    <a href="tutorial">
+    <a href="guide/quickstart">
       <div class="card">
           <img src="../assets/images/icons/code-icon.svg" height="70px">
           <div class="card-text-container">
-            <div class="text-headline">Start Tutorial</div>
-            <p>Start building your Angular application in TypeScript.</p>
+            <div class="text-headline">Get Started</div>
+            <p>Start building your Angular application.</p>
           </div>
       </div>
     </a>

aio/content/navigation.json

@@ -15,6 +15,10 @@
     {
       "url": "events",
       "title": "Events"
+    },
+    {
+      "url": "https://blog.angularjs.org/",
+      "title": "Blog"
     }
   ],
 
@@ -33,6 +37,10 @@
         {
           "url": "events",
           "title": "Events"
+        },
+        {
+          "url": "https://blog.angularjs.org/",
+          "title": "Blog"
         }
       ]
     }
@@ -434,6 +442,11 @@
           "url": "presskit",
           "title": "Press Kit",
           "tooltip": "Press contacts, logos, and branding."
+        },
+        {
+          "url": "https://blog.angularjs.org/",
+          "title": "Blog",
+          "tooltip": "Angular Blog"
         }
       ]
     },