Add ansible-local provisioner website docs

website/source/docs/provisioners/ansible-local.html.markdown

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+---
+layout: "docs"
+page_title: "Ansible (Local) Provisioner"
+---
+
+# Ansible Local Provisioner
+
+Type: `ansible-local`
+
+The `ansible-local` provisioner configures Ansible to run on the machine by
+Packer from local Playbook and Role files.  Playbooks and Roles can be uploaded
+from your local machine to the remote machine.  Ansible is run in [local mode](http://www.ansibleworks.com/docs/playbooks2.html#local-playbooks) via the ansible-playbook command.
+
+## Basic Example
+
+The example below is fully functional.
+
+<pre class="prettyprint">
+{
+    "type": "ansible-local",
+    "playbook_file": "local.yml"
+}
+</pre>
+
+## Configuration Reference
+
+The reference of available configuration options is listed below.
+
+Required:
+
+* `playbook_file` (string) - The playbook file to be executed by ansible.
+  This file must exist on your local system and will be uploaded to the
+  remote machine.
+
+Optional:
+
+* `playbook_paths` (array of strings) - An array of paths to playbook files on
+  your local system. These will be uploaded to the remote machine under
+  `staging_directory`/playbooks. By default, this is empty.
+
+* `role_paths` (array of strings) - An array of paths to role directories on
+  your local system. These will be uploaded to the remote machine under
+  `staging_directory`/roles. By default, this is empty.
+
+* `staging_directory` (string) - The directory where all the configuration of
+  Ansible by Packer will be placed. By default this is "/tmp/packer-provisioner-ansible-local".
+  This directory doesn't need to exist but must have proper permissions so that
+  the SSH user that Packer uses is able to create directories and write into
+  this folder. If the permissions are not correct, use a shell provisioner prior
+  to this to configure it properly.