README: Update table of contents

Signed-off-by: Rob Bradford <robert.bradford@intel.com>

README.md

@@ -1,27 +1,28 @@
 [![Build Status](https://travis-ci.com/cloud-hypervisor/cloud-hypervisor.svg?branch=master)](https://travis-ci.com/cloud-hypervisor/cloud-hypervisor)
 
-1. [What is Cloud Hypervisor?](#1-what-is-cloud-hypervisor)
-   * [Requirements](#requirements)
-	 + [High Level](#high-level)
-     + [Architectures](#architectures)
-	 + [Guest OS](#guest-os)
-2. [Getting Started](#2-getting-started)
-   * [Clone and build](#clone-and-build)
-   * [Run](#run)
-	 + [Cloud image](#cloud-image)
-	 + [Custom kernel and disk image](#custom-kernel-and-disk-image)
+- [1. What is Cloud Hypervisor?](#1-what-is-cloud-hypervisor)
+	- [Objectives](#objectives)
+		- [High Level](#high-level)
+		- [Architectures](#architectures)
+		- [Guest OS](#guest-os)
+- [2. Getting Started](#2-getting-started)
+	- [Clone and build](#clone-and-build)
+		- [Containerized builds and tests](#containerized-builds-and-tests)
+	- [Run](#run)
+		- [Cloud image](#cloud-image)
+		- [Custom kernel and disk image](#custom-kernel-and-disk-image)
 			- [Building your kernel](#building-your-kernel)
 			- [Disk image](#disk-image)
 			- [Booting the guest VM](#booting-the-guest-vm)
-3. [Status](#2-status)
-	* [Device Model](#device-model)
-	* [TODO](#todo)
-4. [rust-vmm dependency](#4-rust-vmm-dependency)
-	* [Firecracker and crosvm](#firecracker-and-crosvm)
-5. [Community](#5-community)
-	* [Contribute](#contribute)
-	* [Join us](#join-us)
-6. [Security](#6-security)
+- [3. Status](#3-status)
+	- [Hot Plug](#hot-plug)
+	- [Device Model](#device-model)
+	- [TODO](#todo)
+- [4. `rust-vmm` project dependency](#4-rust-vmm-project-dependency)
+	- [Firecracker and crosvm](#firecracker-and-crosvm)
+- [5. Community](#5-community)
+	- [Contribute](#contribute)
+	- [Join us](#join-us)
 
 # 1. What is Cloud Hypervisor?