Add a link in the home to the getting-started page

Ref gruntjs#143

src/tmpl/index.jade

@@ -19,7 +19,7 @@ block content
 
           .why.right
             h2 Why use Grunt?
-            p The Grunt ecosystem is huge and it's growing every day. With literally hundreds of plugins to choose from, you can use Grunt to automate just about anything with a minimum of effort. If someone hasn't already built what you need, authoring and publishing your own Grunt plugin to npm is a breeze.
+            p The Grunt ecosystem is huge and it's growing every day. With literally hundreds of plugins to choose from, you can use Grunt to automate just about anything with a minimum of effort. If someone hasn't already built what you need, authoring and publishing your own Grunt plugin to npm is a breeze. See how to <a href="/getting-started">get started</a>.
 
           .technology
             h2 Available Grunt plugins