Minor doc tweaks

_includes/navigation.html

@@ -1,6 +1,6 @@
 <div class="nav-main">
   <div class="wrap">
-    <a class="nav-home" href="/react/index.html">
+    <a class="nav-home" href="/react/">
       <img class="nav-logo" src="/react/img/logo.svg" width="36" height="36">
       React
     </a>

docs/hello-world.md

@@ -4,6 +4,8 @@ title: Hello World
 permalink: docs/hello-world.html
 prev: installation.html
 next: introducing-jsx.html
+redirect_from: "docs/index.html"
+redirect_from: "docs/getting-started.html"
 ---
 
 The easiest way to get started with React is to use [this Hello World example code on CodePen](http://codepen.io/gaearon/pen/ZpvBNJ?editors=0010). You don't need to install anything; you can just open it in another tab and follow along as we go through examples. If you'd rather use a local development environment, check out the [Installation](/docs/installation.html) page.

docs/installation.md

@@ -2,9 +2,7 @@
 id: installation
 title: Installation
 permalink: docs/installation.html
-redirect_from: "docs/index.html"
 redirect_from: "downloads.html"
-redirect_from: "docs/getting-started.html"
 redirect_from: "docs/tooling-integration.html"
 redirect_from: "/docs/package-management.html"
 redirect_from: "/docs/language-tooling.html"