Update Readme table of contents

TOC created using the `github-markdown-toc` tool from
https://github.com/ekalinin/github-markdown-toc.

Readme.md

@@ -12,24 +12,29 @@ Adds an overlay to the OpenVR dashboard that allows access to advanced settings
 
 ![Example Screenshot](docs/screenshots/InVRScreenshot.png)
 
-- [Features](#features)
+* [Features](#features)
-- [Usage](#usage)
+* [Usage](#usage)
-  * [Installer](#installer)
+  * [Windows](#windows)
-  * [Standalone](#standalone)
+     * [Installer](#installer)
+     * [Standalone](#standalone)
+  * [Linux](#linux)
+     * [AppImage](#appimage)
+     * [Building from Source](#building-from-source)
   * [Bindings](#bindings)
-    + [Music](#music)
+     * [Music](#music)
-    + [Motion](#motion)
+     * [Motion](#motion)
-    + [Misc.](#misc)
+     * [Misc.](#misc)
-    + [Haptics.](#haptics)
+     * [Haptics.](#haptics)
   * [Default Bindings](#default-bindings)
-    + [Vive Wands](#vive-wands)
+     * [Vive Wands](#vive-wands)
-    + [Knuckles](#knuckles)
+     * [Valve Index Controllers (Knuckles)](#valve-index-controllers-knuckles)
-    + [Other Controllers](#other-controllers)
+     * [WMR](#wmr)
+     * [Other Controllers](#other-controllers)
   * [SteamVR Input Guide](#steamvr-input-guide)
   * [Command Line Arguments](#command-line-arguments)
   * [INI File Options](#ini-file-options)
   * [Preview builds](#preview-builds)
-- [Documentation](#documentation)
+* [Documentation](#documentation)
   * [Top Page](#top-page)
   * [- SteamVR Page](#--steamvr-page)
   * [- Chaperone Page](#--chaperone-page)
@@ -40,15 +45,14 @@ Adds an overlay to the OpenVR dashboard that allows access to advanced settings
   * [- Audio Page](#--audio-page)
   * [- Video Page](#--video-page)
   * [- Utilities Page](#--utilities-page)
-  * [- Desktop Overlay Page](#--desktop-overlay-page)
   * [- Statistics Page](#--statistics-page)
   * [- Settings Page](#--settings-page)
-- [How to Compile](#how-to-compile)
+* [How to Compile](#how-to-compile)
   * [Building on Windows](#building-on-windows)
   * [Building on Linux](#building-on-linux)
-- [Notes:](#notes-)
+* [Notes:](#notes)
-- [Common Issues](#common-issues)
+* [Common Issues:](#common-issues)
-- [License](#license)
+* [License](#license)
 
 # Features