add vagrant docs to website

website/source/docs/builders/vagrant.html.md

@@ -1,3 +1,14 @@
+---
+description: |
+    The Vagrant Packer builder is able to launch Vagrant boxes and
+    re-package them into .box files
+layout: docs
+page_title: 'Vagrant - Builders'
+sidebar_current: 'docs-builders-vagrant'
+---
+
+# Vagrant Builder
+
 The Vagrant builder is intended for building new boxes from already-existing
 boxes. Your source should be a URL or path to a .box file or a Vagrant Cloud
 box name such as `hashicorp/precise64`.
@@ -19,7 +30,8 @@ by setting the `skip package` option. You can also change the behavior so that
 rather than inititalizing a new Vagrant workspace, you use an already defined
 one, by using `global_id` instead of `source_box`.
 
-Required:
+## Configuration Reference
+### Required:
 
 -    `source_path` (string) - URL of the vagrant box to use, or the name of the
     vagrant box. `hashicorp/precise64`, `./mylocalbox.box` and
@@ -38,7 +50,7 @@ Required:
    `source_box`, Packer will skip the Vagrant initialize and add steps, and
    simply launch the box directly using the global id.
 
-Optional:
+### Optional:
 
 -   `output_dir` (string) - The directory to create that will contain
     your output box. We always create this directory and run from inside of it to

website/source/layouts/docs.erb

@@ -171,6 +171,9 @@
           <li<%= sidebar_current("docs-builders-triton") %>>
             <a href="/docs/builders/triton.html">Triton</a>
           </li>
+          <li<%= sidebar_current("docs-builders-vagrant") %>>
+            <a href="/docs/builders/vagrant.html">Vagrant</a>
+          </li>
           <li<%= sidebar_current("docs-builders-virtualbox") %>>
             <a href="/docs/builders/virtualbox.html">VirtualBox</a>
             <ul class="nav">