docs(installing): fix up ReST syntax

Author: Matthew Fisher

docs/installing_deis/create-cluster.rst

@@ -4,7 +4,7 @@
 .. _create_cluster:
 
 Create a Cluster
-======================
+================
 
 Applications on Deis are deployed to a :ref:`cluster`. Before you can deploy
 applications, you need to create a cluster.

docs/installing_deis/provision-controller.rst

@@ -6,6 +6,7 @@
 
 Provision a Controller
 ======================
+
 The `controller` is the brains of a Deis platform. Provisioning a Deis
 controller is a matter of creating one or more :ref:`concepts_coreos`
 machines and installing a few necessary *systemd* units to manage
@@ -18,6 +19,7 @@ with CoreOS.
 
 Amazon EC2
 ----------
+
 The `contrib/ec2` section of the Deis project includes shell scripts,
 documentation, and a customized CloudFormation template to make it easy
 to provision a multi-node Deis cluster on `Amazon EC2`_.
@@ -26,6 +28,7 @@ Please see `contrib/ec2`_ for details on using Deis on Amazon EC2.
 
 Rackspace
 ---------
+
 The `contrib/rackspace` section of the Deis project includes shell
 scripts, documentation, and a cloud-config template to make it easy to
 provision a multi-node Deis cluster on Rackspace_ cloud.
@@ -35,13 +38,15 @@ Rackspace cloud.
 
 Bare Metal
 ----------
+
 The `contrib/bare-metal` section of the Deis project includes documentation in
 README.md to help with provisioning a multi-node cluster on your own hardware.
 
 Please see `contrib/bare-metal`_ for details on using Deis on bare metal.
 
 Vagrant
 -------
+
 The root of the Deis project includes documentation in README.md, a
 Makefile and a Vagrantfile to make it easy to provision a single- or
 multi-node Deis cluster on Vagrant_ virtual machines.